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A146809 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1010-1111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,1,1,17,17,65,65,349,349,3731,3731,77219,77219,2029815,

%T 2029815,63522619,63522619

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1010-1111 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.0.0.0.0.0.0.0

%e .0.0.0.1.0.1.0.0.0

%e .0.1.0.1.0.1.0.1.0

%e .1.1.1.1.0.1.1.1.1

%e .0.0.0.0.0.0.0.0.0

%e .1.1.1.1.0.1.1.1.1

%e .0.1.0.1.0.1.0.1.0

%e .0.0.0.1.0.1.0.0.0

%e .0.0.0.0.0.0.0.0.0

%K nonn

%O 1,9

%A _R. H. Hardin_, Nov 04 2008

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Last modified September 28 18:53 EDT 2022. Contains 357081 sequences. (Running on oeis4.)