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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0110-1100-0111 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:13

%S 1,1,1,1,1,1,17,31,559,1013,8291,23145,356907,1013595,108749189,

%T 407493401,61299279691,281660353619,43848445982931,246087198399431,

%U 73605493456575165,501006153269757647

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0110-1100-0111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.0.0.1.0.0

%e .1.0.1.0.0.1.0.1

%e .1.1.1.0.0.1.1.1

%e .0.1.0.0.0.0.1.0

%e .1.0.0.0.0.0.0.1

%e .1.0.1.0.0.1.0.1

%e .1.1.1.0.0.1.1.1

%e .0.1.0.0.0.0.1.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008