triangular number

Noun

Meaning

English Wikipedia has an article on:triangular numberWikipedia
triangular number (plural triangular numbers)

(mathematics) 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.

Source: en.wiktionary.org

Synonyms

triangle number

Close letter words and terms

triangular kite triangular ligament triangular matrix triangular operation triangular prism triangular projection