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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11011-01110-00100 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:17

%S 1,1,1,1,1,1,6,1,15,1,83,13,668,49,6957,332,94212,3073,1778981,36531,

%T 47461296,597879,1754228305,14127501,89063295956,454449581

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11011-01110-00100 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.1.1.0.1.1.0.0

%e .0.0.0.1.1.1.0.0.0

%e .1.0.0.0.1.0.0.0.1

%e .1.1.0.0.0.0.0.1.1

%e .0.1.1.0.0.0.1.1.0

%e .1.1.0.0.0.0.0.1.1

%e .1.0.0.0.1.0.0.0.1

%e .0.0.0.1.1.1.0.0.0

%e .0.0.1.1.0.1.1.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_