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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1010-1111-0101 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:17

%S 1,1,1,1,1,1,1,5,17,31,51,113,291,823,2647,8411,31311,121645,537901,

%T 2460285,12092291,63560047,371846157,2296989649

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1010-1111-0101 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.0.1.0.0.0.1.1

%e .1.1.1.1.0.1.1.0

%e .0.1.0.1.0.0.1.1

%e .0.0.0.0.0.1.1.0

%e .0.1.1.0.0.0.0.0

%e .1.1.0.0.1.0.1.0

%e .0.1.1.0.1.1.1.1

%e .1.1.0.0.0.1.0.1

%K nonn

%O 1,8

%A _R. H. Hardin_