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%I #4 Mar 31 2012 12:35:10
%S 1,1,1,1,1,1,5,13,29,41,99,219,653,1719,7125,30115,144385,515791,
%T 2502679,10851481,66672841,362202203,2693814149,19415112859,
%U 179313023913,1385523385051
%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 111-110-111 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.0.1.1.1.0
%e .1.0.1.0.1.1.0.0
%e .1.1.1.0.1.1.1.0
%e .1.1.1.0.0.0.0.0
%e .0.0.0.0.0.1.1.1
%e .0.1.1.1.0.1.1.1
%e .0.0.1.1.0.1.0.1
%e .0.1.1.1.0.0.0.0
%K nonn
%O 1,7
%A _R. H. Hardin_
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