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232 (number) : ウィキペディア英語版 | 232 (number) 232 (two hundred () thirty two) is the natural number following 231 and preceding 233. 232 is both a central polygonal number and a cake number. It is both a decagonal number and a centered 11-gonal number.〔.〕 It is also a refactorable number, a Motzkin sum, an idoneal number, and a noncototient. 232 is a telephone number: in a system of seven telephone users, there are 232 different ways of pairing up some of the users.〔.〕 There are also exactly 232 different eight-vertex connected indifference graphs, and 232 bracelets with eight beads of one color and seven of another. Because this number has the form , it follows that there are exactly 232 different functions from a set of four elements to a proper subset of the same set. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「232 (number)」の詳細全文を読む
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