triangular number

English

Noun

triangular number (plural triangular numbers)

1. (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.

Synonyms

• triangle number

Hyponyms

• hexagonal number

Translations

an integer which is the sum of n natural numbers

• Chinese:

  Mandarin: 三角形數／三角形数 (zh) (sānjiǎoxíngshù)

• Dutch: driehoeksgetal n
• Esperanto: triangula nombro
• Finnish: kolmioluku
• German: Dreieckszahl (de) f
• Hungarian: háromszögszám
• Italian: numero triangolare m
• Japanese: 三角数 (sankaku-sū)
• Latin: numerus triangularis m
• Polish: liczba trójkątna f
• Russian: треуго́льное число́ n (treugólʹnoje čisló)
• Spanish: número triangular m
• Tagalog: bilang na tatsihain