| 词条 | Evil number |
| 释义 |
In number theory, an evil number is a non-negative integer that has an even number of 1s in its binary expansion. The first evil numbers are: 0, 3, 5, 6, 9, 10, 12, 15, 17, 18, 20, 23, 24, 27, 29, 30, 33, 34, 36, 39 ...[1] These numbers give the positions of the zero values in the Thue–Morse sequence. Non-negative integers that are not evil are called odious numbers. References1. ^{{Cite OEIS|A001969|name=Evil numbers: numbers with an even number of 1's in their binary expansion}} 1 : Integer sequences |
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