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| | Evil Number -- from Wolfram MathWorld |
 | | However, the term "evil" is also used to denote nonnegative integers that have an even number of 1s in their binary expansions, the first few of which are 0, 3, 5, 6, 9, 10, 12, 15, 17, 18, 20,... |
 | | The probability of the digits of a given real number summing to a relatively large positive integer is roughly given by the number of nonzero digits divided by sum of those digits, namely |
 | | The analogous problem of terms in a simple continued fraction summing to a given number can also be considered. |
| mathworld.wolfram.com /EvilNumber.html (335 words) |
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