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%I
%S 1,1,1,3,7,15,31,73,307,1451,6775,33773,192865,1471507,13382667,
%T 137085697,1565839497,20450552451,319414253795,5882181538191,
%U 126047394686961,3114606848932875
%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1000-1111 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.1.0.0.0.0
%e .0.0.0.1.0.0.0.0
%e .0.0.0.1.0.1.0.0
%e .1.1.1.1.0.1.0.0
%e .0.0.0.0.0.1.0.1
%e .0.0.1.1.1.1.0.1
%e .0.0.0.0.0.0.0.1
%e .0.0.0.0.1.1.1.1
%K nonn
%O 1,4
%A _R. H. Hardin_, Nov 04 2008
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