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A147330 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,1,1,6,13,32,43,80,143,550,1371,5869,15663,62826,179478,

%T 939656,3406007,21134246,88331414,597297267

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.1.0.0.0.0.1.0

%e .1.1.1.1.1.0.0.1.0

%e .0.0.1.0.0.1.1.1.1

%e .0.0.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.0.0

%e .1.1.1.1.0.0.1.0.0

%e .0.1.0.0.1.1.1.1.1

%e .0.1.0.0.0.0.1.0.0

%K nonn

%O 1,9

%A _R. H. Hardin_

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Last modified September 20 22:45 EDT 2021. Contains 347596 sequences. (Running on oeis4.)