Odious number
A kind of number
About Odious number
An odious number is a non-negative integer that has an odd number of 1s in its binary expansion. The complement of evil numbers (which have an even number of 1s).
Key features
- 1, 2, 4, 7, 8, 11, 13, 14, … are odious.
- Every positive integer is either evil or odious.
Examples: