A147256 - OEIS

A147256

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0001-1101-0111 pattern in any orientation.

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

%S 1,1,1,1,1,1,17,21,549,1079,10673,26871,476485,1364599,88490477,

%T 316329117,38154154091,169142706059,28100677201207,150981261883543,

%U 38976852011544623

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0001-1101-0111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .1.1.1.0.0.1.1.1

%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

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008