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A tetrahedral number, or triangular pyramidal number, ... This page was last edited on 16 December 2024, at 09:13 (UTC).
A pyramid with side length 5 contains 35 spheres. Each layer represents one of the first five triangular numbers. A truncated triangular pyramid number [1] is found by removing some smaller tetrahedral number (or triangular pyramidal number) from each of the vertices of a bigger tetrahedral number.
In mathematics, a centered tetrahedral number is a centered figurate number that represents a tetrahedron. ... This page was last edited on 13 December 2024, ...
The term figurate number is used by different writers for members of ... tetrahedral numbers made up of successive ... This page was last edited on 3 August 2024, ...
2024 – tetrahedral number [18] 2025 = 45 2, square of the sum of the first nine positive integers (and therefore sum of the cubes of the first nine positive integers, by Nicomachus's theorem), centered octagonal number, [19] lowest number with exactly 15 odd divisors. [20] Current calendar year. Sum from 11 to 64. Sum of odd numbers from 1 to 89.
This is a list of recreational number theory topics ... Tetrahedral number; Pyramidal number ... This page was last edited on 15 August 2024, ...
They equal the sums of consecutive tetrahedral numbers, and are one-fourth of a larger tetrahedral number. ... This page was last edited on 13 December 2024, ...
Tetrahedral number; Tetrahedral symmetry; Tetrahedrane; Tetrahedron packing; Tetrapod (structure) ... This page was last edited on 20 July 2024, at 02:02 (UTC).