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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1100-0111 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:11

%S 1,1,1,1,1,1,1,1,17,17,57,57,337,337,3641,3641,94309,94309,2415539,

%T 2415539,84963203,84963203

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1100-0111 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.1.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.1.0

%e .0.1.1.1.0.1.1.1.0

%e .0.0.1.1.0.1.1.0.0

%e .0.0.0.0.0.0.0.0.0

%e .0.0.1.1.0.1.1.0.0

%e .0.1.1.1.0.1.1.1.0

%e .0.1.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.1.0

%K nonn

%O 1,9

%A _R. H. Hardin_, Nov 04 2008