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Many years ago I read something that mentioned a book I would like to find. Apparently this book is sort of an encyclopedia for integers; each entry lists interesting mathematical facts about that integer. A bit like the The On-Line Encyclopedia of Integer Sequences, but for individual integers.

Unfortunately, my web-searching-fu has failed me. Does this book ring a bell to anyone?

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    $\begingroup$ Wikipedia has articles for many positive integers that include facts like that. $\endgroup$ – Daniel McLaury Sep 3 '14 at 17:15
  • $\begingroup$ this is the link to the wiki numbers: en.wikipedia.org/wiki/Category:Integers many of them contain the note "This article may contain excessive, poor, or irrelevant examples..." $\endgroup$ – miracle173 Sep 3 '14 at 17:16
  • $\begingroup$ Try prime curios - has pages on lots of positive integers (prime related facts though) $\endgroup$ – martin Sep 3 '14 at 21:24
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There is also "The Penguin Dictionary of Curious and Interesting Numbers" by David Weils but this does extend beyond integers.

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Perhaps you are thinking of The Book of Numbers?

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