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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:14

%S 1,1,1,1,1,1,1,1,21,33,187,315,2369,4615,64775,147707,4198889,

%T 11294757,484939233,1526217059,94525856839,346917020079,

%U 34819307110751,149345046116449,24639152995360273,123617463688011623

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.1.0.0.0.0.0.1.0

%e .1.1.1.0.0.0.1.1.1

%e .0.1.1.1.0.1.1.1.0

%e .0.0.1.0.0.0.1.0.0

%e .0.0.0.0.0.0.0.0.0

%e .0.0.1.0.0.0.1.0.0

%e .0.1.1.1.0.1.1.1.0

%e .1.1.1.0.0.0.1.1.1

%e .0.1.0.0.0.0.0.1.0

%K nonn

%O 1,9

%A _R. H. Hardin_, Nov 04 2008