TRIANGULAR NUMBER


Meaning of TRIANGULAR NUMBER in English

transcription, транскрипция: [ noun ]

Date: 1795

: a number (as 3, 6, 10, 15) representable by that many dots arranged in rows that form a triangle and that equals n(n + 1)/2 for some positive integer value of n

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.