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Definition of Triangular number
1. Noun. (mathematics) Any integer that is the sum of ''n'' natural numbers from 1 to ''n''. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Triangular Number
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1. Noun. (mathematics) Any integer that is the sum of ''n'' natural numbers from 1 to ''n''. ¹
¹ Source: wiktionary.com