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A147237 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1101-0111-0001 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,3,19,37,71,177,551,1807,6509,26627,139987,688205,4186827,

%T 24218141,169157335,1233973193

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1101-0111-0001 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.1.0.1.1.0

%e .1.0.0.1.1.1.0.0

%e .1.1.0.1.0.0.0.0

%e .0.1.0.0.0.1.1.1

%e .1.1.1.0.0.0.1.0

%e .0.0.0.0.1.0.1.1

%e .0.0.1.1.1.0.0.1

%e .0.1.1.0.1.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008

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Last modified March 26 21:31 EDT 2023. Contains 361553 sequences. (Running on oeis4.)