A147124 - OEIS

A147124

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1111-1000 pattern in any orientation.

%I #4 Mar 31 2012 12:35:15

%S 1,1,1,1,1,1,1,1,183,351,3263,7493,94421,245945,5221197,15740513,

%T 1251933355,4637231205,678331261037,3060437240807,522754227927889

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1111-1000 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.0.1.0.1.0.0.0

%e .1.1.1.1.0.1.1.1.1

%e .0.0.0.1.0.1.0.0.0

%e .0.0.0.0.0.0.0.0.0

%e .1.0.0.0.0.0.0.0.1

%e .1.1.1.1.0.1.1.1.1

%e .1.0.0.0.0.0.0.0.1

%K nonn

%O 1,9

%A _R. H. Hardin_, Nov 04 2008