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Square of a triangular number
In number theory, the sum of the first n cubes is the square of the nth triangular number. That is, 1 3 + 2 3 + 3 3 + ⋯ + n 3 = ( 1 + 2 + 3 + ⋯ + n ) 2
Squared_triangular_number
Integer that is both a perfect square and a triangular number
mathematics, a square triangular number (or triangular square number) is a number which is both a triangular number and a square number, in other words
Square_triangular_number
Figurate number
arranged in an equilateral triangle. The triangular lattice representing the n {\displaystyle n} th triangular number contains n {\displaystyle n} rows: the
Triangular_number
Product of an integer with itself
squared". The name square number comes from the name of the shape. The unit of area is defined as the area of a unit square (1 × 1). Hence, a square with
Square_number
Figurate number
A pentagonal number is a figurate number that extends the concept of triangular and square numbers to the pentagon, but, unlike the first two, the patterns
Pentagonal_number
Natural number
non-trivial square triangular number. Aside from being the smallest square triangular number other than 1, it is also the only triangular number (other than
36_(number)
Type of figurate number
properties of oblong, triangular, and square numbers. The number 10 for example, can be arranged as a triangle (see triangular number): But 10 cannot be
Polygonal_number
Number used to approximate the square root of 2
As well as being used to approximate the square root of two, Pell numbers can be used to find square triangular numbers, to construct integer approximations
Pell_number
Natural number
152), an octagonal number, and a squared triangular number (225 = (1 + 2 + 3 + 4 + 5)2 = 13 + 23 + 33 + 43 + 53) . As the square of a double factorial
225_(number)
Centered figurate number that represents a triangle with a dot in the center
A centered (or centred) triangular number is a centered figurate number that represents an equilateral triangle with a dot in the center and all its other
Centered_triangular_number
Figure that, added to a given figure, makes a larger figure of the same shape
multiplication table proves the Nicomachus theorem, claiming that each squared triangular number is a sum of consecutive cubes. In an acute isosceles triangle
Gnomon_(figure)
Figurate number
A pyramidal number is the number of points in a pyramid with a polygonal base and triangular sides. The term often refers to square pyramidal numbers
Pyramidal_number
Natural number
0x5f3759df 1,606,879,040 : Dowling number 1,626,557,542 : Is "QWERTY" in base 36. 1,631,432,881 = 403912, square triangular number 1,673,196,525 : Least common
1,000,000,000
Indian mathematician-astronomer (476–550)
{\displaystyle 1^{3}+2^{3}+\cdots +n^{3}=(1+2+\cdots +n)^{2}} (see squared triangular number) Aryabhata's system of astronomy was called the audAyaka system
Aryabhata
Type of triangular number
n} th triangular number, then the doubly triangular numbers are the numbers of the form T T n {\displaystyle T_{T_{n}}} . The doubly triangular numbers
Doubly_triangular_number
Natural number
7-digit prime number 1,000,405 = Smallest triangular number with 7 digits and the 1,414th triangular number 1,002,001 = 10012, palindromic square 1,006,003
1,000,000
Number of stacked spheres in a pyramid
n-th square pyramidal number. The number of rectangles in a square grid is given by the squared triangular numbers. The square pyramidal number P n {\displaystyle
Square_pyramidal_number
Natural number
is the fourth square triangular number. As a figurate number, 204 is also a nonagonal number and a truncated triangular pyramid number. 204 is a member
204_(number)
Natural number
prime number 10,001,628 = Smallest triangular number with 8 digits and the 4,472nd triangular number 10,004,569 = 31632, the smallest 8-digit square 10,077
10,000,000
Polyhedral number representing a tetrahedron
A tetrahedral number, or triangular pyramidal number, is a figurate number that represents a pyramid with a triangular base and three sides, called a tetrahedron
Tetrahedral_number
Number of dots in a centred dot square
In elementary number theory, a centered square number is a centered figurate number that gives the number of dots in a square with a dot in the center
Centered_square_number
Prism with a 3-sided base
base's edges equals the number of its square faces. More generally, the triangular prism is uniform. This means that a triangular prism has regular faces
Triangular_prism
Class of series of figurate numbers, each having a central dot
initial 1. For example, each centered square number in the series is four times the previous triangular number, plus 1. This can be formalized by the
Centered_polygonal_number
Natural number
pyramidal number and a dodecagonal number. Additionally, it is the index, in the sequence of triangular numbers, of the fifth square triangular number: 41616
288_(number)
Size of a geometric arrangement of points
The term figurate number is used by different writers for members of different sets of numbers, generalizing from triangular numbers to different shapes
Figurate_number
Sum of a factorial number and a triangular number
In number theory, a factoriangular number is an integer formed by adding a factorial and a triangular number with the same index. The name is a portmanteau
Factoriangular_number
Mathematical problem of square numbers which are also square-pyramidal
are both tetrahedral and square pyramidal. Square triangular number, the numbers that are simultaneously square and triangular Close-packing of equal spheres
Cannonball_problem
Natural number
J. A. (ed.). "Sequence A000537 (Sum of first n cubes; or n-th triangular number squared.)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation
9
Two joined triangular cupolae
geometry, the triangular orthobicupola is the 27th Johnson solid. As the name suggests, it can be constructed by attaching two triangular cupolae along
Triangular_orthobicupola
Polyhedron with eight triangular faces
Augmented triangular prism: The result of gluing a triangular prism to a square pyramid, this has six equilateral triangle faces and two square faces. It
Octahedron
Number equal to the sum of its proper divisors
2^{p-1}(2^{p}-1)} , each even perfect number is the ( 2 p − 1 ) {\displaystyle (2^{p}-1)} -th triangular number (and hence equal to the sum of the integers
Perfect_number
centered square number, Mertens function zero 1014 = 210-10, Mertens function zero, sum of the nontriangular numbers between successive triangular numbers
1000_(number)
Natural number
of 100 and also the square of 100,000. 10,000,000,019 = smallest 11-digit prime number. 10,000,020,331 = smallest triangular number with 11 digits and
10,000,000,000
Integer having a non-trivial divisor
number of prime factors. A composite number with two prime factors is a semiprime or 2-almost prime (the factors need not be distinct, hence squares of
Composite_number
Centered figurate number
numbers. Geometrically, the nth star number is made up of a central point and 12 copies of the (n−1)th triangular number — making it numerically equal to
Star_number
Number divisible only by 1 and itself
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that
Prime_number
Every positive integer is a sum of at most n n-gonal numbers
such representations of the number 17, for example, are shown below: 17 = 10 + 6 + 1 (triangular numbers) 17 = 16 + 1 (square numbers) 17 = 12 + 5 (pentagonal
Fermat polygonal number theorem
Fermat_polygonal_number_theorem
Number, product of consecutive integers
triangular number and n more than the nth square number, as given by the alternative formula n2 + n for pronic numbers. Hence the nth pronic number and
Pronic_number
Non-sinusoidal waveform
playing this file? See media help. A triangular wave or triangle wave is a non-sinusoidal waveform named for its triangular shape. It is a periodic, piecewise
Triangle_wave
Iterative algorithm on numbers
In number theory, Kaprekar’s routine is an iterative algorithm named after its inventor, Indian mathematician D. R. Kaprekar. Each iteration starts with
Kaprekar's_routine
Natural number
second and only prime triangular number, and Carl Friedrich Gauss proved that every integer is the sum of at most three triangular numbers. Three is the
3
Ten raised to an integer power
the number ten; in other words, ten multiplied by itself a certain number of times (when the power is a positive integer). By definition, the number one
Power_of_10
Numbers with a certain property involving recursive summation
In number theory, a happy number is a number which eventually reaches 1 when the number is replaced by the sum of the square of each digit. For instance
Happy_number
Matrix decomposition
orthonormal matrix Q and an upper triangular matrix R. QR decomposition is often used to solve the linear least squares (LLS) problem and is the basis for
QR_decomposition
Number used for counting
natural-number results: subtracting a larger natural number from a smaller one results in a negative number and dividing one natural number by another
Natural_number
Natural number
number following 44 and preceding 46. The number 45 is an odd composite number (3²×5), recognized as the 9th triangular number and a Kaprekar number.
45_(number)
Class of natural numbers with many divisors
the number of divisors of n. The term was coined by Ramanujan (1915). For example, the number with the most divisors per square root of the number itself
Superior highly composite number
Superior_highly_composite_number
Natural number
(four thousand) is the natural number following 3999 and preceding 4001. It is a decagonal number. 4005 – triangular number 4007 – safe prime 4010 – magic
4000_(number)
Natural number
both its prime factors being Gaussian primes. While 21 is the sixth triangular number, it is also the sum of the divisors of the first five positive integers:
21_(number)
Number that represents a hexagon with a dot in the center
{n(n-1)}{2}}\right)} shows that the centered hexagonal number for n is 1 more than 6 times the (n − 1)th triangular number. In the opposite direction, the index n corresponding
Centered_hexagonal_number
Base-dependent property of integers
mathematics, a natural number in a given number base is a p {\displaystyle p} -Kaprekar number if the representation of its square in that base can be split
Kaprekar_number
Recursive integer sequence
they were previously discovered in the 1730s by Minggatu. The n-th Catalan number can be expressed directly in terms of the central binomial coefficients
Catalan_number
Class of binary number
In number theory, an evil number is a non-negative integer that has an even number of 1s in its binary expansion. These numbers give the positions of
Evil_number
cantellated square tiling honeycomb, rr{4,4,3}, has cuboctahedron, square tiling, and triangular prism facets, with an isosceles triangular prism vertex
Square_tiling_honeycomb
Natural number
number. a centered triangular number. a centered square number. a decagonal number. the smallest number that can be expressed as a sum of two squares
85_(number)
Natural number
J. A. (ed.). "Sequence A000537 (Sum of first n cubes; or n-th triangular number squared)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation
100
Natural number
constant 6181 – octahedral number 6200 – harmonic divisor number 6201 – square pyramidal number 6216 – triangular number 6217 – super-prime, prime of
6000_(number)
Prime number of the form 2^n – 1
mathematics, a Mersenne prime is a prime number that is one less than a power of two. That is, it is a prime number of the form Mn = 2n − 1 for some integer
Mersenne_prime
Natural number
Carmichael number 2835 – odd abundant number, decagonal number 2843 – centered heptagonal prime 2850 – triangular number 2862 – pronic number 2870 – square pyramidal
2000_(number)
Result of multiplying six instances of a number
are simultaneously square and triangular, and the solutions to the cannonball problem, which are simultaneously square and square-pyramidal. Because of
Sixth_power
Number that remains the same when its digits are reversed
A palindromic number (also known as a numeral palindrome or a numeric palindrome) is a number (such as 16361) that remains the same when its digits are
Palindromic_number
Concept in combinatorics
In mathematics, the cake number, denoted by Cn, is the maximum of the number of regions into which a 3-dimensional cube can be partitioned by exactly
Cake_number
Numbers parameterizing ways to partition a set
second kind can be understood as inverses of one another when viewed as triangular matrices. This article is devoted to specifics of Stirling numbers of
Stirling numbers of the second kind
Stirling_numbers_of_the_second_kind
Abundant number whose proper divisors are all deficient numbers
primitive abundant number is an abundant number whose proper divisors are all deficient numbers. For example, 20 is a primitive abundant number because: The
Primitive_abundant_number
Numbers that contain only the digit 1
In recreational mathematics, a repunit is a number like 11, 111, or 1111 that contains only the digit 1 — a more specific type of repdigit. The term stands
Repunit
Natural number, composite number
hexagonal lattice, 14 is also the number of fixed two-dimensional triangular-celled polyiamonds with four cells. 14 is the number of elements in a regular heptagon
14_(number)
Type of composite integer
In number theory, a Smith number is a composite number for which, in a given number base, the sum of its digits is equal to the sum of the digits in its
Smith_number
Shape-shifting puzzle similar to Rubik's Cube
1993, with patent number D340,093. The Square-1 consists of three layers. The upper and lower layers contain kite and triangular pieces. They are also
Square-1_(puzzle)
Number that is the result of operation on its own digits
A Friedman number is an integer, which represented in a given numeral system, is the result of a non-trivial expression using all its own digits in combination
Friedman_number
Type of figurate number
A nonagonal number, or an enneagonal number, is a figurate number that extends the concept of triangular and square numbers to the nonagon (a nine-sided
Nonagonal_number
Centered figurate number that counts points in a three-dimensional pattern
\left(n^{2}+n+1\right).} The same number can also be expressed as a trapezoidal number (difference of two triangular numbers), or a sum of consecutive
Centered_cube_number
Natural number
largest triangular number that is also a repdigit. Since 36 is a triangular number too, 666 is a doubly triangular number. Also, 666 is the sum of squares of
666_(number)
Natural number
divides the Euclid number 2999# + 1 3003 – triangular number, only number known to appear eight times in Pascal's triangle; no number is known to appear
3000_(number)
Natural number between 89 and 91
50 the fifth). The twelfth triangular number 78 is the only number to have an aliquot sum equal to 90, aside from the square of the twenty-fourth prime
90_(number)
Type of Poulet number
In number theory, a super-Poulet number is a Poulet number, or pseudoprime to base 2, whose every divisor d {\displaystyle d} divides 2 d − 2 {\displaystyle
Super-Poulet_number
Natural number
triangle (as all triangular and tetragonal numbers appear in it). Because 15 is also triangular, 120 is a doubly triangular number. 120 is divisible
120_(number)
Type of natural number
In number theory, a colossally abundant number (sometimes abbreviated as CA) is a natural number that, in a particular, rigorous sense, has many divisors
Colossally_abundant_number
Polygonal number Triangular number Square number Pentagonal number Hexagonal number Heptagonal number Octagonal number Nonagonal number Decagonal number Centered
List of recreational number theory topics
List_of_recreational_number_theory_topics
Numeral ambigram
A strobogrammatic number is a number whose numeral is rotationally symmetric, so that it appears the same when rotated by 180 degrees. In other words,
Strobogrammatic_number
Number that is less than the sum of its proper divisors
In number theory, an abundant number or excessive number is a positive integer for which the sum of its proper divisors is greater than the number. The
Abundant_number
Count of permutations by cycles
second kind can be understood as inverses of one another when viewed as triangular matrices. This article is devoted to specifics of Stirling numbers of
Stirling numbers of the first kind
Stirling_numbers_of_the_first_kind
Number whose divisors summed twice over equal twice itself
are any odd superperfect numbers. An odd superperfect number n would have to be a square number such that either n or σ(n) is divisible by at least three
Superperfect_number
Numbers k where x - phi(x) = k has many solutions
In number theory, a branch of mathematics, a highly cototient number is a positive integer k {\displaystyle k} which is above 1 and has more solutions
Highly_cototient_number
Type of number introduced by Mike Keith
mathematics, a Keith number or repfigit number (short for repetitive Fibonacci-like digit) is a natural number n {\displaystyle n} in a given number base b {\displaystyle
Keith_number
Number that has more digits than the number of digits in its prime factorization
In number theory, a frugal number is a natural number in a given number base that has more digits than the number of digits in its prime factorization
Frugal_number
Numbers obtained by adding the two previous ones
The only triangular Fibonacci numbers are 1, 3, 21, and 55, which was conjectured by Vern Hoggatt and proved by Luo Ming. No Fibonacci number can be a
Fibonacci_sequence
Number of close-packed spheres in an octahedron
In number theory, an octahedral number is a figurate number that represents the number of spheres in an octahedron formed from close-packed spheres. The
Octahedral_number
Integer filtered out using a sieve similar to that of Eratosthenes
In number theory, a lucky number is a natural number in a set which is generated by a certain "sieve". This sieve is similar to the sieve of Eratosthenes
Lucky_number
Number, non-palindrome after repeated sum with reverse
numbers exist? More unsolved problems in mathematics A Lychrel number is a natural number that cannot form a palindrome through the iterative process of
Lychrel_number
Natural number
number following 189 and preceding 191. 190 is a triangular number, a hexagonal number, and a centered nonagonal number, the fourth figurate number (after
190_(number)
Convex polyhedron with 16 triangular faces
gyroelongated square bipyramid is a polyhedron with 16 triangular faces. it can be constructed from a square antiprism by attaching two equilateral square pyramids
Gyroelongated square bipyramid
Gyroelongated_square_bipyramid
Natural number whose divisor sum is greater than that of any smaller number
In number theory, a highly abundant number is a natural number with the property that the sum of its divisors (including itself) is greater than the sum
Highly_abundant_number
Regular tiling of the plane
In geometry, the triangular tiling or triangular tessellation is one of the three regular tilings of the Euclidean plane, and is the only such tiling
Triangular_tiling
Natural number
the square of 10000. 100,000,007 = smallest nine digit prime 100,005,153 = smallest triangular number with 9 digits and the 14,142nd triangular number 100
100,000,000
Type of figurate number
number is a triangular number, but only every other triangular number (the 1st, 3rd, 5th, 7th, etc.) is a hexagonal number. Like a triangular number,
Hexagonal_number
Constant used in a magic square
magic square which is also a: triangular number is 15 (solve the Diophantine equation x2 = y3 + 16y + 16, where y is divisible by 4); square number is 1
Magic_constant
Product of two prime numbers
In number theory, a semiprime is a natural number that is the product of exactly two prime numbers. The two primes in the product may equal each other
Semiprime
Natural number
of square numbers beginning 0, 1, 4, 25, 196, ... in which each number is the smallest square that differs from the previous number by a triangular number
196_(number)
Number whose first n digits is a multiple of n
In mathematics a polydivisible number (or magic number) is a number in a given number base with digits abcde... that has the following properties: Its
Polydivisible_number
Integer whose multiples are digit rotations
A cyclic number is an integer for which cyclic permutations of the digits are successive integer multiples of the number. The most widely known is the
Cyclic_number
SQUARED TRIANGULAR-NUMBER
SQUARED TRIANGULAR-NUMBER
Girl/Female
Tamil
Scared
Boy/Male
Arabic, Muslim
Scared
Boy/Male
Hindu, Indian, Marathi
Scared
Boy/Male
American, Australian, British, English
Shield Bearer; Knight's Companion
Surname or Lastname
English
English : patronymic from Squire.
Boy/Male
Hindu, Indian
Scared
Boy/Male
French Latin
A squire.
Boy/Male
Tamil
Harshnil | ஹரà¯à®·à¯à®¨à¯€à®²
Scared
Harshnil | ஹரà¯à®·à¯à®¨à¯€à®²
Boy/Male
American, British, English
Battlefield; From the Triangular Field
Boy/Male
American, British, English
Lives in the Triangular Farm Stead
Surname or Lastname
English
English : status name from Middle English squyer ‘esquire’, ‘a man belonging to the feudal rank immediately below that of knight’ (from Old French esquier ‘shield bearer’). At first it denoted a young man of good birth attendant on a knight, or by extension any attendant or servant, but by the 14th century the meaning had been generalized, and referred to social status rather than age. By the 17th century, the term denoted any member of the landed gentry, but this is unlikely to have influenced the development of the surname.
Girl/Female
Hindu
Equaled, Similar
Boy/Male
English
From the triangular field.
Girl/Female
Muslim
Scared
Boy/Male
African, American, Anglo, Australian, British, Christian, English, Jamaican
Battlefield; Spear Field; Triangular Field
Boy/Male
English
Lives in the triangular farm stead.
Boy/Male
Italian
Squire.
Boy/Male
English American
Shieldbearer.
Girl/Female
Hindu
Scared
Girl/Female
Tamil
Equaled, Similar
SQUARED TRIANGULAR-NUMBER
SQUARED TRIANGULAR-NUMBER
Biblical
who governs Syria, often called Cyrenius
Boy/Male
Hindu, Indian, Kannada, Traditional
An Author of Old Times
Boy/Male
Christian & English(British/American/Australian)
Frequenter of Gatherings
Surname or Lastname
English
English : habitational name from Brundish in Suffolk, so named with Old English burna ‘stream’ + edisc ‘pasture’.
Male
Japanese
(åœä¸€) Japanese name KEIICHI means "square jewel first (son)."
Boy/Male
English Greek American
Dionysius is the mythological Greek god of wine responsible for growth of the vines and the...
Girl/Female
Hindu
Similar, Resembling
Girl/Female
Bengali, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
A Part of Lord Shiva
Girl/Female
Tamil
Bhavaprita | பாவபà¯à®°à¯€à®¤à®¾
One who is loved by the universe
Male
English
Pet form of English Luke, LUCKY means "from Lucania." In some cases it may come directly from the vocabulary word, meaning simply "lucky."
SQUARED TRIANGULAR-NUMBER
SQUARED TRIANGULAR-NUMBER
SQUARED TRIANGULAR-NUMBER
SQUARED TRIANGULAR-NUMBER
SQUARED TRIANGULAR-NUMBER
a.
Forming a right angle; as, a square corner.
n.
To multiply by itself; as, to square a number or a quantity.
n. pl.
The triangular, or maioid, crabs. See Illust. under Maioid, and Illust. of Spider crab, under Spider.
n.
A square. See 1st Squire.
n.
One who squares, or quarrels; a hot-headed, contentious fellow.
n.
A square; a measure; a rule.
a.
Of or pertaining to a square, or to squares; resembling a quadrate, or square; square.
n.
Having the toe square.
imp. & p. p.
of Squire
n.
One who, or that which, squares.
adv.
In a square form or manner.
imp. & p. p.
of Square
n.
An instrument having at least one right angle and two or more straight edges, used to lay out or test square work. It is of several forms, as the T square, the carpenter's square, the try-square., etc.
a.
Oblong or elongated, and having three lateral angles; as, a triangular seed, leaf, or stem.
n.
Hence, anything which is square, or nearly so
n.
A square piece or fragment.
adv.
In a triangular manner; in the form of a triangle.
a.
Rendering equal justice; exact; fair; honest, as square dealing.
n.
The product of a number or quantity multiplied by itself; thus, 64 is the square of 8, for 8 / 8 = 64; the square of a + b is a2 + 2ab + b2.
v. t.
To make triangular, or three-cornered.