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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:10

%S 1,1,1,1,1,6,1,20,13,138,69,1792,528,26977,7033,655185,141904,

%T 24548006,4322355,1409242126,197401178,123270232283,13868215311,

%U 16071746508178,1479290583806,3212023185510693

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.0.0.1.1.0.0.0

%e .1.0.1.1.1.1.0.1

%e .1.1.0.0.0.0.1.1

%e .1.1.0.0.0.0.1.1

%e .1.0.1.1.1.1.0.1

%e .0.0.0.1.1.0.0.0

%e .0.0.0.0.0.0.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_