企鹅趣味数字词典
The Penguin dictionary of curious and interesting numbers
David G. Wells · 初版 1986 年
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为什么 Hardy 乘坐的出租车号码非同寻常？为什么 Graham's number 需要专门的记数法？多少粒沙子才能填满整个宇宙？Golden Ratio 与向日葵之间有何联系？为什么999不仅仅是一个求救电话？这本引人入胜的著作解答了所有这些问题以及更多谜题。本书现已全面修订，新增近200个新词条，并对原词条补充了约250处内容。从负一及其平方根，到循环数、奇异数、亲和数、完全数、不可及数和幸运数，再到 aliquot sequences、Cattle problem、Pascal's triangle 等……
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我可以推荐以下几本：John Derbyshire 的《Unknown Quantity - A real and imaginary history of algebra》、David Wells 的《The Penguin Dictionary of Curious and Interesting Numbers》、William Dunham 的《The Mathematical Universe - An Alphabetical Journey Through the Great Proofs, Problems and Personalities》、Alex Bellos 的《Alex's Adventures in The Numberland - Dispatches from the wonderful…
I can recommend the following: John Derbyshire's Unknown Quantity - A real and imaginary history of algebra David Well's The Penguin Dictionary of Curious and Interesting Numbers William Dunham's The Mathematical Universe - An Alphabetical Journey Through the Great Proofs, Problems and Personalities Alex Bello's Alex's Adventures in The Numberland - Dispatches from the wonderful…
……没有出现在任何数列里的数字会自动晋升为“有趣的”；它有点像某种数列意义上的素数，尽管本身并不是素数。另外，还有一本专门收录有趣数字的目录：《Penguin Dictionary of Curious and Interesting numbers》。我大学时的一位教授每节课前都会念上一条。https://www.thriftbooks.com/w/the-penguin-dictionary-of-curi...
…number that doesn’t appear in any sequences automatically promotes it to interesting; it’s some kind of sequence prime without being an actual prime. Also, there is a catalog of interesting numbers: the Penguin Dictionary of Curious and Interesting numbers. A college prof of mine would read an entry before each class. https://www.thriftbooks.com/w/the-penguin-dictionary-of-curi...