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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 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:12

%S 1,1,1,1,1,3,13,31,59,133,487,1853,8419,38423,183353,1033531,6717069,

%T 50468649,417543651,3765006993,38269269195,435116516817

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

%e Maximal 8 X 8 example

%e .0.0.0.1.1.1.0.0

%e .0.0.1.1.0.1.0.0

%e .1.1.0.0.0.0.1.0

%e .1.0.0.0.0.0.1.1

%e .1.1.0.0.0.0.0.1

%e .0.1.0.0.0.0.1.1

%e .0.0.1.0.1.1.0.0

%e .0.0.1.1.1.0.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_, Nov 04 2008