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Longer titles found: Squared triangular number (view), Square triangular number (view), Centered triangular number (view), Doubly triangular number (view)

searching for Triangular number 7 found (143 total)

alternate case: triangular number

Bernoulli's triangle (505 words) [view diff] exact match in snippet view article find links to article

numbers. As the third column of Bernoulli's triangle (k = 2) is a triangular number plus one, it forms the lazy caterer's sequence for n cuts, where n
100 (878 words) [view diff] exact match in snippet view article find links to article
N. 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
Hypsicles (1,029 words) [view diff] exact match in snippet view article find links to article
when the common difference is 1, the sum of all the numbers is a triangular number; when 2 a square; when 3, a pentagonal number [and so on]. And the
Nicomachus (1,015 words) [view diff] exact match in snippet view article find links to article
Nicomachus's theorem states that a square whose side length is a triangular number can be partitioned into squares and half-squares whose areas add to
Gematria (5,163 words) [view diff] exact match in snippet view article find links to article
the order of letters. It is also sometimes called Mispar Meshulash (triangular number). Mispar Mispari spells out the standard values of each letter by
Porism (1,486 words) [view diff] exact match in snippet view article find links to article
lines cut two and two into 1⁄2n(n − 1) points, 1⁄2n(n − 1) being a triangular number whose side is n − 1. If they are made to turn about the n fixed points
Pascal's pyramid (3,386 words) [view diff] exact match in snippet view article find links to article
in each layer. The number of terms in the nth layer is the (n+1)th triangular number: ( n + 1 ) × ( n + 2 ) 2 {\displaystyle {\frac {(n+1)\times (n+2)}{2}}}