login
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11100-00100-00111 pattern in any orientation.
0

%I #4 Mar 31 2012 12:35:16

%S 1,1,1,1,1,1,7,9,31,55,549,1047,10041,21681,484881,1255593,40179283,

%T 122480813,7136007271,25526356825,2044413653787,8531086609057,

%U 1153670123416227,5640169181500505,1230123398597079731

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11100-00100-00111 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 .0.0.1.0.0.1.0.0

%e .1.1.1.0.0.1.1.1

%e .1.0.0.0.0.0.0.1

%e .1.0.0.0.0.0.0.1

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008