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A146673 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0110 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:11

%S 1,1,1,1,1,17,51,293,1459,7621,56935,702993,8365419,152139369,

%T 2979251133

%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0110 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.1.1.0

%e .0.1.0.0.1.1.1.0

%e .1.1.0.0.0.0.1.1

%e .1.1.1.0.0.1.0.0

%e .0.0.1.0.0.1.1.1

%e .1.1.0.0.0.0.1.1

%e .0.1.1.1.0.0.1.0

%e .0.1.1.0.0.0.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_, Nov 04 2008

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)