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A147228 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11011-01110 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:16

%S 1,1,1,1,1,1,2,1,4,1,6,1,14,3,43,10,138,29,612,94,3177,321,17102,1262,

%T 109974,7231,884546,51504

%N Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11011-01110 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.0.0.0.0.0.0.0

%e .0.0.1.1.0.1.1.0.0

%e .0.1.0.1.1.1.0.1.0

%e .0.1.1.0.0.0.1.1.0

%e .0.0.1.0.0.0.1.0.0

%e .0.1.1.0.0.0.1.1.0

%e .0.1.0.1.1.1.0.1.0

%e .0.0.1.1.0.1.1.0.0

%e .0.0.0.0.0.0.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008

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Last modified April 24 14:32 EDT 2024. Contains 371960 sequences. (Running on oeis4.)