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235 (number) : ウィキペディア英語版 | 235 (number)
235 is the integer after 234 and before 236. ==In mathematics== 235 is a figurate number in two ways: it is both a heptagonal number and a centered triangular number. There are 235 different trees with 11 unlabeled nodes. If an equilateral triangle is subdivided into smaller equilateral triangles whose side length is 1/9 as small, the resulting "matchstick arrangement" will have exactly 235 different equilateral triangles of varying sizes in it.
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