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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0100-0111-0001 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:15

%S 1,1,1,1,1,1,1,1,5,5,17,17,45,45,217,217,1805,1805,29665,29665,431133,

%T 431133,7762019,7762019,212346129,212346129

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0100-0111-0001 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.1.1.0.1.1.0.0

%e .0.0.1.0.0.0.1.0.0

%e .1.1.1.0.0.0.1.1.1

%e .1.0.0.0.0.0.0.0.1

%e .0.0.0.0.0.0.0.0.0

%e .1.0.0.0.0.0.0.0.1

%e .1.1.1.0.0.0.1.1.1

%e .0.0.1.0.0.0.1.0.0

%e .0.0.1.1.0.1.1.0.0

%K nonn

%O 1,9

%A _R. H. Hardin_, Nov 04 2008