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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:16

%S 1,1,1,1,1,1,3,7,16,39,109,339,1359,6341,32204,186717,1250465,9543435,

%T 82560858,815884422,9279731421,121699162939,1834559945393,

%U 31585819621707

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.1

%e .0.0.0.0.0.0.0.1

%e .0.0.0.0.1.1.1.1

%e .0.0.0.1.0.0.0.1

%e .0.0.0.1.0.0.0.1

%e .0.0.0.1.0.0.0.0

%e .0.1.1.1.1.1.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_