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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1101-0111 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:12

%S 1,1,1,1,1,1,1,1,1,1,3,3,13,13,35,35,157,157,741,741,4435,4435,44453,

%T 44453

%N Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1101-0111 pattern in any orientation.

%e Maximal 11 X 11 example

%e .0.0.0.1.1.0.1.1.0.0.0

%e .0.0.0.1.0.0.0.1.0.0.0

%e .0.0.0.1.1.0.1.1.0.0.0

%e .1.1.1.0.1.0.1.0.1.1.1

%e .1.0.1.1.0.0.0.1.1.0.1

%e .0.0.0.0.0.0.0.0.0.0.0

%e .1.0.1.1.0.0.0.1.1.0.1

%e .1.1.1.0.1.0.1.0.1.1.1

%e .0.0.0.1.1.0.1.1.0.0.0

%e .0.0.0.1.0.0.0.1.0.0.0

%e .0.0.0.1.1.0.1.1.0.0.0

%K nonn

%O 1,11

%A _R. H. Hardin_, Nov 04 2008