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A146225 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111 pattern in any orientation. 0

%I

%S 1,1,1,1,9,13,39,69,2575,6405,191203,599559,31751065,124920743,

%T 19072164165,96207487051,23729375699967,150729249130871,

%U 86943333060607105,701895334984042253,791712727158897187729

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.0.0.0.0.1.1

%e .1.1.0.0.0.0.1.1

%e .1.0.0.0.0.0.0.1

%e .1.0.0.0.0.0.0.1

%e .0.0.1.0.0.1.0.0

%e .0.0.1.0.0.1.0.0

%e .0.1.1.0.0.1.1.0

%e .0.1.1.0.0.1.1.0

%K nonn

%O 1,5

%A _R. H. Hardin_

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Last modified January 23 21:56 EST 2022. Contains 350515 sequences. (Running on oeis4.)