| 单词 | hexagonal numbers |
| 释义 | > as lemmashexagonal numbers hexagonal numbers n. the series of polygonal adj. and n. numbers 1, 6, 15, 28, 45, 66, 91, etc., formed by continuous summation of the arithmetical series 1, 5, 9, 13, 17, 21, 25, etc.If any one of these be multiplied by 32 and 4 added to the product the result will be a square number.extracted from hexagonaladj.n.< as lemmas |
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