| Part of Speech | Definition | |
| Expression | 1. (Arith.), the numbers of the series 1, 7, 18, 34, 55, etc., being figurate numbers formed by adding successively the terms of the arithmetical series 1, 6, 11, 16, 21, etc.[Websters]. | |
| Top | ||
Common Expressions: HEPTAGONAL NUMBERS
| Expressions | Definition | ||
| Heptagonal numbers | (Arith.), the numbers of the series 1, 7, 18, 34, 55, etc., being figurate numbers formed by adding successively the terms of the arithmetical series 1, 6, 11, 16, 21, etc. Source: Webster's Revised Unabridged Dictionary. | ||
Source: compiled by the editor from various references; see credits. | Top | ||
