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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11111-00010 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:14

%S 1,1,1,1,1,1,5,13,31,111,377,1545,10231,72633,559663,5155711,55582209,

%T 698619471,11001973207,206072905483,4521907343165,116328599746355,

%U 3545239477906611,127491366766265465

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11111-00010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.1.0.0

%e .0.0.0.0.1.1.0.0

%e .0.0.0.0.0.1.0.0

%e .0.0.0.0.0.1.1.0

%e .0.1.0.0.0.1.0.0

%e .1.1.1.1.1.0.0.0

%e .0.0.0.1.0.0.0.0

%e .0.0.0.0.0.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008