| 词条 | 205 (number) |
| 释义 |
| number = 205 | divisor = 1, 5, 41, 205 }} 205 (two hundred [and] five) is the natural number following 204 and preceding 206. In mathematics205 is a lucky number,[1] and a Wolstenholme number.[2] On an infinite chessboard, a knight can reach exactly 205 squares within four moves.[3] There are 205 different ways of forming a connected graph by adding six edges to a set of five labeled vertices.[4] See also
References1. ^{{Cite OEIS|A000959|name=Lucky numbers}} {{Integers|2}}{{DEFAULTSORT:205 (Number)}}2. ^{{Cite OEIS|A007406|name=Wolstenholme numbers}} 3. ^{{Cite OEIS|A018836|name=Number of squares on infinite chess-board at <= n knight's moves from a fixed square}} 4. ^{{Cite OEIS|A061540|name=Number of connected labeled graphs with n nodes and n+1 edges}} 1 : Integers |
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