triangular number

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English

Etymology

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Pronunciation

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Noun

triangular number noun

Any integer that is the sum of n natural numbers from 1 to n.“Ten is a triangular number being the sum of 1, 2, 3, and 4.”

Verb

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Synonyms

tetrahedral number ternion n-tuple triple triangularization triangularisation triangle threeness threeside triacontad triad number prime triplet triacontagon treble triacontatetragon

Usage & collocations

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Usage in the wild

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References