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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1101-0111 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:12

%S 1,1,1,1,9,13,35,63,1723,4113,139447,424285,17547037,65696265,

%T 8305366965,39548747551,8986486324279,53849970214263,

%U 23104370746283843,173734005704827315

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

%e Maximal 8 X 8 example

%e .1.1.0.0.0.0.1.1

%e .0.1.0.0.0.0.1.0

%e .1.1.0.0.0.0.1.1

%e .1.0.0.0.0.0.0.1

%e .0.0.1.0.0.1.0.0

%e .0.1.1.0.0.1.1.0

%e .0.1.0.0.0.0.1.0

%e .0.1.1.0.0.1.1.0

%K nonn

%O 1,5

%A _R. H. Hardin_, Nov 04 2008