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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1111-1111 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:14

%S 1,1,1,1,1,3,7,14,39,110,377,1728,8445,46261,295085,2140608,18281422,

%T 182971434,2102657419,27813973723,424019281880,7465054408643,

%U 152329530023565,3599461276657166,98302190158216996,3100794527661403207

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1111-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.1.1.1.0.0

%e .0.0.1.1.1.1.0.0

%e .1.1.0.0.0.0.1.1

%e .1.1.0.0.0.0.1.1

%e .1.1.0.0.0.0.1.1

%e .1.1.0.0.0.0.1.1

%e .0.0.1.1.1.1.0.0

%e .0.0.1.1.1.1.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_, Nov 04 2008