%I #4 Mar 31 2012 12:35:11
%S 1,1,1,1,3,7,19,43,167,933,5533,35651,275619,2803985,35280241,
%T 511587387,8841277573,187861018789,4919632132323,154644209783001
%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1000-1111 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.1.1.1.1.0
%e .0.0.0.1.0.0.0.0
%e .0.0.0.1.1.0.0.0
%e .1.1.1.0.0.1.1.1
%e .1.0.1.0.0.1.0.1
%e .1.0.0.1.1.0.0.1
%e .1.0.0.1.0.0.0.1
%e .0.0.0.1.1.1.1.0
%K nonn
%O 1,5
%A _R. H. Hardin_, Nov 04 2008
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