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%I #7 Mar 30 2012 18:38:50
%S 3,5,8,9,21,23,33,39,51,63,65,81,89,95,99,113,131,173,183,191,209,215,
%T 221,239,245,251,261,281,285,299,303,309,315,341,345,363,369,371,393,
%U 411,419,431,443,473,495,509,525,543,545,561,575,593,645,659,683,711
%N Numbers n such that gcd((2n)!+1, n!+1) > 1.
%K easy,nonn
%O 1,1
%A _Benoit Cloitre_, Feb 20 2002