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A146616 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0110 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,5,19,43,79,175,645,2171,9657,44753,231501,1238311,

%T 7694793,51485225,407164775,3411323191

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0110 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.1.0.0

%e .0.0.1.1.1.1.0.0

%e .1.1.0.1.1.0.1.0

%e .0.1.1.0.0.1.1.0

%e .0.1.1.0.0.1.1.0

%e .0.1.0.1.1.0.1.1

%e .0.0.1.1.1.1.0.0

%e .0.0.1.0.0.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008

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Last modified October 5 03:25 EDT 2022. Contains 357240 sequences. (Running on oeis4.)