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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1101-0111-0010 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:16

%S 1,1,1,1,1,1,9,17,43,77,187,693,2641,10331,50859,230621,1381217,

%T 7944835,57500635,415589871,3698671025

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1101-0111-0010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.1.0.1.1.0

%e .1.0.0.1.1.1.0.0

%e .1.1.0.0.1.0.0.0

%e .0.1.1.0.0.0.1.1

%e .1.1.0.0.0.1.1.0

%e .0.0.0.1.0.0.1.1

%e .0.0.1.1.1.0.0.1

%e .0.1.1.0.1.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008