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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1110-0111 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:10

%S 1,1,1,1,1,1,9,15,35,57,245,579,3057,8465,49975,173815,1305505,

%T 5674409,52338659,276967501,3125019047,20455456921,286529633207,

%U 2318729204115

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1110-0111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.1.1.1.0

%e .1.0.0.1.1.1.0.0

%e .1.1.0.0.0.0.0.0

%e .1.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.1

%e .0.0.0.0.0.0.1.1

%e .0.0.1.1.1.0.0.1

%e .0.1.1.1.0.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_