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A146620 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1001-1111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,5,1,13,13,77,73,597,385,9569,4155,164139,53517,3530729,

%T 1280671,136089779,42489917,6885316541,1853052759,545054905807,

%U 122748998951,61234243905707

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1001-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.1.1.1.0.0

%e .0.0.1.0.0.1.0.0

%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 .1.1.0.0.0.0.1.1

%e .0.0.1.0.0.1.0.0

%e .0.0.1.1.1.1.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_, Nov 04 2008

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Last modified January 30 22:45 EST 2023. Contains 359947 sequences. (Running on oeis4.)