%I #4 Mar 31 2012 12:35:17
%S 1,1,1,1,1,1,3,7,15,27,67,281,1263,5491,23639,128337,894617,7261755,
%T 63564439,605898697,6745478781,88749999709,1352715152779
%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1111-0001-0001 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.0.0.0.0.0
%e .0.0.0.0.1.0.0.0
%e .0.0.0.0.1.0.0.0
%e .0.0.0.0.1.1.1.1
%e .0.1.1.1.0.0.0.1
%e .0.0.0.1.0.0.0.1
%e .0.0.0.1.0.0.0.0
%e .0.0.0.1.1.1.0.0
%K nonn
%O 1,7
%A _R. H. Hardin_