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A146823 Number of n X n binary arrays with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation. 0

%I

%S 1,1,1,9,33,81,501,9765,253829,5201161,149256829,9047294209,

%T 886839186693,108530571403501

%N Number of n X n binary arrays with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.0.0.1.1.0.0

%e .0.1.1.1.0.1.1.1

%e .0.1.0.0.0.1.0.0

%e .0.1.0.0.0.1.0.0

%e .1.0.0.0.0.0.1.0

%e .1.1.1.1.0.0.1.0

%e .0.1.0.0.1.1.1.0

%e .0.1.0.0.0.0.1.1

%K nonn

%O 1,4

%A _R. H. Hardin_, Nov 04 2008

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Last modified July 6 15:30 EDT 2022. Contains 355110 sequences. (Running on oeis4.)