A118142 Numbers n such that a perfect n X n parity pattern exists.

4, 5, 9, 11, 16, 19, 23, 29, 30, 32, 33, 39, 47, 59, 61, 62, 64, 65, 67, 79, 84, 95, 101, 119, 123, 125, 126, 128, 129, 131, 135, 154, 159, 164, 169, 170, 185, 191, 203, 204, 239, 247, 251, 253, 254, 256, 257, 259

Offset: 1

Author

Don Knuth, May 11 2006

Keywords

• nonn

Comments

See A118141 for definitions and references.

Crossrefs

A subsequence of A117870.