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A146778 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0010-1010-1111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,5,17,43,145,633,4131,31831,267243,2665825,33726547,

%T 521722083,9834245987,228276099483,6476476460303,221310304612835,

%U 9127636122908961

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0010-1010-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.1.1.1.0.0

%e .0.0.1.0.1.0.0.0

%e .1.1.0.0.1.0.0.1

%e .1.0.0.0.0.1.1.1

%e .1.1.1.0.0.0.0.1

%e .1.0.0.1.0.0.1.1

%e .0.0.0.1.0.1.0.0

%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 February 2 16:10 EST 2023. Contains 360023 sequences. (Running on oeis4.)