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A147022 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11111-01000 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,5,13,31,111,377,1541,10233,72291,558454,5131417,54944663,

%T 692190273,10939712070,204848963285,4494698536817,115494793546585,

%U 3510886748616781,126280436031316355

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11111-01000 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.1.0.0

%e .0.0.0.0.0.1.0.0

%e .0.0.0.0.0.1.0.0

%e .0.0.0.0.1.1.1.0

%e .0.0.0.1.0.1.0.0

%e .1.1.1.1.1.0.0.0

%e .0.0.0.1.0.0.0.0

%e .0.0.0.0.0.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008

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Last modified January 19 17:26 EST 2022. Contains 350466 sequences. (Running on oeis4.)