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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:10

%S 1,1,1,1,3,9,23,77,415,2809,21039,202829,2557861,41110329,812468577,

%T 20241517719,638623731453,25413793552471

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.1.1.1.0

%e .0.0.0.0.0.0.1.1

%e .0.0.0.0.0.0.0.1

%e .0.0.0.0.0.1.1.0

%e .1.0.0.0.0.0.1.1

%e .1.0.0.1.0.0.0.1

%e .1.1.0.1.1.0.0.1

%e .0.1.1.0.1.1.1.0

%K nonn

%O 1,5

%A _R. H. Hardin_