%I #3 Mar 31 2012 12:35:07
%S 1,1,1,4,2,1,1,1,16,1,8,1,1,4,1,16,2,1,256,1,1,1,128,4,1,1,1,1
%N Number of symmetric n X n binary matrices with each element equal to one minus the sum of its horizontal and vertical neighbors, modulo two.
%C A075462 is a(n) without the symmetry restriction.
%K nonn
%O 1,4
%A _R. H. Hardin_, Sep 16 2008