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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 110-111-100 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:09

%S 1,1,1,1,1,1,133,283,2411,6513,104581,308359,31267501,125706815,

%T 30388182025,158816649115,38510941635475,255401019744941,

%U 142458224930527429,1198142574949310095,2063515953281030710129

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 110-111-100 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.1.0.0.1.1.1

%e .1.1.0.0.0.0.1.1

%e .0.1.0.0.0.0.1.0

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.0.1.0.0.1.0.0

%e .1.1.1.0.0.1.1.1

%e .0.1.1.0.0.1.1.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Oct 27 2008