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%I #4 Aug 08 2015 23:57:24
%S 4,5,9,11,16,19,23,29,30,32,33,39,47,59,61,62,64,65,67,79,84,95,101,
%T 119,123,125,126,128,129,131,135,154,159,164,169,170,185,191,203,204,
%U 239,247,251,253,254,256,257,259
%N Numbers n such that a perfect n X n parity pattern exists.
%C See A118141 for definitions and references.
%Y A subsequence of A117870.
%K nonn
%O 1,1
%A _Don Knuth_, May 11 2006
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