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A147508 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11110-01111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,3,9,23,81,267,1053,6173,40853,301993,2684783,27089119,

%T 322029889,4723820567,81998776493,1660922956591,39864394187483,

%U 1124746291185333

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11110-01111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.1.1.1.1.0.0.0

%e .1.0.1.1.1.1.0.0

%e .1.1.0.0.0.0.1.0

%e .1.1.0.0.0.0.1.1

%e .1.1.0.0.0.0.1.1

%e .0.1.0.0.0.0.1.1

%e .0.0.1.1.1.1.0.1

%e .0.0.0.1.1.1.1.0

%K nonn

%O 1,6

%A _R. H. Hardin_

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Last modified May 20 23:05 EDT 2022. Contains 353886 sequences. (Running on oeis4.)