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A118143 Numbers n for which there exists a perfect n X n parity pattern with 8-fold symmetry. 1
4, 5, 11, 16, 23, 29, 30, 32, 47, 59, 62, 64, 65, 84, 95, 101, 119, 125, 126, 128, 131, 154, 164, 170, 185, 191, 203, 204, 239, 251, 254, 256, 257 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A118141 for definitions and references.

If an odd number m appears then so does 2m+1.

LINKS

Table of n, a(n) for n=1..33.

CROSSREFS

Sequence in context: A076065 A176115 A066898 * A001350 A077238 A185507

Adjacent sequences:  A118140 A118141 A118142 * A118144 A118145 A118146

KEYWORD

nonn

AUTHOR

Don Knuth, May 11 2006

STATUS

approved

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Last modified December 5 17:42 EST 2019. Contains 329768 sequences. (Running on oeis4.)