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A147491 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11101-10111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,1,1,1,1,25,25,137,137,521,521,6501,6501,70441,70441,

%T 694381,694381,20946853,20946853,656540805

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11101-10111 pattern in any orientation.

%e Maximal 11 X 11 example

%e .1.1.0.1.1.0.1.1.0.1.1

%e .0.1.0.1.0.0.0.1.0.1.0

%e .1.1.0.1.1.0.1.1.0.1.1

%e .1.0.0.0.1.0.1.0.0.0.1

%e .1.1.0.1.1.0.1.1.0.1.1

%e .0.0.0.0.0.0.0.0.0.0.0

%e .1.1.0.1.1.0.1.1.0.1.1

%e .1.0.0.0.1.0.1.0.0.0.1

%e .1.1.0.1.1.0.1.1.0.1.1

%e .0.1.0.1.0.0.0.1.0.1.0

%e .1.1.0.1.1.0.1.1.0.1.1

%K nonn

%O 1,11

%A _R. H. Hardin_

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Last modified September 18 04:22 EDT 2021. Contains 347508 sequences. (Running on oeis4.)