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A147483 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11011-01110-00100 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,6,1,15,1,83,13,668,49,6957,332,94212,3073,1778981,36531,

%T 47461296,597879,1754228305,14127501,89063295956,454449581

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11011-01110-00100 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.1.1.0.1.1.0.0

%e .0.0.0.1.1.1.0.0.0

%e .1.0.0.0.1.0.0.0.1

%e .1.1.0.0.0.0.0.1.1

%e .0.1.1.0.0.0.1.1.0

%e .1.1.0.0.0.0.0.1.1

%e .1.0.0.0.1.0.0.0.1

%e .0.0.0.1.1.1.0.0.0

%e .0.0.1.1.0.1.1.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_

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Last modified January 21 05:57 EST 2022. Contains 350473 sequences. (Running on oeis4.)