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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01110-00011 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:15

%S 1,1,1,1,1,1,7,9,31,55,787,1573,22701,53447,1146545,3177491,131825683,

%T 433244499,34337767649,134703759045,16271838583281,75677568824871,

%U 14799633241575103,81580228946827257

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01110-00011 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 .0.0.1.0.0.1.0.0

%e .0.1.1.0.0.1.1.0

%e .0.1.0.0.0.0.1.0

%e .1.1.0.0.0.0.1.1

%e .1.0.0.0.0.0.0.1

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008