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A146386 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0110-1111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,2,1,4,1,6,3,16,10,59,29,271,100,1436,387,8334,2276,60777,

%T 17581,593102,155034,7275019,1632582,107601705,20304423,1902586023

%N Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0110-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.0.1.1.1.1.0.0

%e .0.1.0.1.1.0.1.0

%e .0.1.1.0.0.1.1.0

%e .0.1.1.0.0.1.1.0

%e .0.1.0.1.1.0.1.0

%e .0.0.1.1.1.1.0.0

%e .0.0.0.0.0.0.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_

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Last modified August 23 22:20 EDT 2019. Contains 326254 sequences. (Running on oeis4.)