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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1010-1111-1010 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:17

%S 1,1,1,1,5,1,19,11,496,277,13622,3725,625566,100329,46290886,7689337

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1010-1111-1010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.1.0.0.0.0.1.0

%e .1.1.1.0.0.1.1.1

%e .0.1.0.0.0.0.1.0

%e .1.1.1.0.0.1.1.1

%K nonn

%O 1,5

%A _R. H. Hardin_