%I #3 Mar 31 2012 12:35:08
%S 1,5,445,38945,61129245,94304065705,2610924486436445,
%T 71050577480317387425
%N 1/6 of the number of 6-colorings of an n X n array symmetric under 180 degree rotation.
%K nonn
%O 1,2
%A _R. H. Hardin_, Oct 05 2008