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A146821 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1110-0111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,3,17,41,79,223,801,2615,9741,48585,263431,1569087,

%T 9472069,65995437,509339343,4406836165

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1110-0111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.0.0.0.0.1.1.1

%e .1.1.0.0.1.1.1.0

%e .1.1.0.0.1.0.0.0

%e .0.1.1.0.0.0.0.0

%e .0.0.0.0.0.1.1.0

%e .0.0.0.1.0.0.1.1

%e .0.1.1.1.0.0.1.1

%e .1.1.1.0.0.0.0.1

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008

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Last modified July 1 16:18 EDT 2022. Contains 354973 sequences. (Running on oeis4.)