Pronic number

A pronic number is a number which is the product of two consecutive integers, that is, a number of the form $n (n + 1)$ . The study of these numbers dates back to Aristotle. They are also called oblong numbers, heteromecic numbers, or rectangular numbers; however, the "rectangular number" name has also been applied to the composite numbers.

单词	Pronic
释义	Pronic 英语百科 Pronic number A pronic number is a number which is the product of two consecutive integers, that is, a number of the form $n (n + 1)$ . The study of these numbers dates back to Aristotle. They are also called oblong numbers, heteromecic numbers, or rectangular numbers; however, the "rectangular number" name has also been applied to the composite numbers.
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