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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1001-1111-0110 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:17

%S 1,1,1,1,1,1,3,8,17,36,53,124,323,1007,2889,11702,39960,173688,672545,

%T 3448944,15619066,95906062,522271313,3756284779,24152062634

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1001-1111-0110 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.0.0.1.0.0.1

%e .0.1.1.0.1.1.1.1

%e .0.1.1.0.0.1.1.0

%e .1.1.0.0.0.0.0.0

%e .0.0.0.0.0.0.1.1

%e .0.1.1.0.0.1.1.0

%e .1.1.1.1.0.1.1.0

%e .1.0.0.1.0.0.1.1

%K nonn

%O 1,7

%A _R. H. Hardin_