Phrase guide

tetrahedral number

noun · 1 senses · updated from the 2026-07-25 local source snapshot

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1

noun

Meaning 1

A number which results from the summation of consecutive triangular numbers, starting from 1. If the triangular numbers in such a summation are depicted as horizontal triangular arrays of units then these arrays can be stacked vertically to yield a tetrahedral array.

Definition source: English Wiktionary via Wiktextract

Topics: mathematics, sciences

Examples

  • The nth tetrahedral number can be calculated with the formula #123;(n#43;1)3-(n#43;1)#92;over 6#125;.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

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