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A146709 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1111-0100 pattern in any orientation. 0

%I

%S 1,1,1,1,1,7,21,51,237,1129,8811,85099,859569,10699439,171553261,

%T 3455226259,90780787231,2937046608631,113622292506777,

%U 5452353589454277,328302441188610241

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1111-0100 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.1.0.0.0.0

%e .0.0.1.1.1.1.0.0

%e .1.1.0.1.0.0.1.0

%e .1.1.1.0.0.0.1.0

%e .0.1.0.0.0.1.1.1

%e .0.1.0.0.1.0.1.1

%e .0.0.1.1.1.1.0.0

%e .0.0.0.0.1.1.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_, Nov 04 2008

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Last modified October 21 02:12 EDT 2021. Contains 348140 sequences. (Running on oeis4.)