Expansion of (1+x)c(x^2)/((1-xc(x^2))*sqrt(1-4x^2)), c(x) the g.f. of A000108.
1, 2, 5, 9, 21, 38, 86, 157, 349, 642, 1410, 2610, 5682, 10572, 22860, 42717, 91869
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Fri Nov 21 19:26:40 CET 2008 [seqfan] Re: Question about A064237 Numbers n such that n! + 1 is divisible by a square.