翻訳と辞書 Words near each other ・ 251 series ・ 251 Sophia ・ 25108 Boström ・ 25109 Hofving ・ 2512 (magazine) ・ 2513 Baetslé ・ 25143 Itokawa ・ 2519 aluminium alloy ・ 251st Air Defense Artillery Regiment ・ 251st Battalion (Good Fellows), CEF ・ 251st Cyberspace Engineering Installation Group ・ 251st Indian Tank Brigade ・ 251st Rifle Division (Soviet Union) ・ 251st Tunnelling Company ・ 252 ・ 252 (number) ・ 252 Air Group ・ 252 AM ・ 252 BC ・ 252 Clementina ・ 252 East 57th Street ・ 2520 (number) ・ 2523 Ryba ・ 2524 Budovicium ・ 2525 (Exordium & Terminus) ・ 2529 Rockwell Kent ・ 252d Combat Communications Group ・ 252nd Armor Regiment ・ 252nd Battalion (Lindsay), CEF ・ 252nd Indian Armoured Brigade Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 252 (number) ： ウィキペディア英語版 252 (number) 252 (two hundred () fifty-two) is the natural number following 251 and preceding 253. 252 is the central binomial coefficient $\backslash tbinom$, and is $\backslash tau(3)$, where $\backslash tau$ is the Ramanujan tau function. 252 is also $\backslash sigma\_3(6)$, where $\backslash sigma\_3$ is the function that sums the cubes of the divisors of its argument: :$1^3+2^3+3^3+6^3=(1^3+2^3)(1^3+3^3)=252.$ It is a practical number, and a hexagonal pyramidal number. There are 252 points on the surface of a cuboctahedron of radius five in the fcc lattice, 252 ways of writing the number 4 as a sum of six squares of integers, 252 ways of choosing four squares from a 4×4 chessboard up to reflections and rotations, and 252 ways of placing four pieces on a Connect Four board. ==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「252 (number)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.