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A146476 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1110-0111 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:10

%S 1,1,1,5,9,21,67,487,1541,16797,92947,1357947,11628507,269865307,

%T 3412847085,120253566545

%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1110-0111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.1.0.1.1.1.0

%e .0.1.1.1.0.1.1.1

%e .0.0.0.0.0.0.0.0

%e .0.1.1.1.0.1.1.1

%e .1.1.1.0.1.1.1.0

%e .0.0.0.0.0.0.0.0

%e .1.1.1.0.1.1.1.0

%e .0.1.1.1.0.1.1.1

%K nonn

%O 1,4

%A _R. H. Hardin_

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Last modified March 28 12:26 EDT 2024. Contains 371254 sequences. (Running on oeis4.)