A147240 - OEIS

A147240

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1101-0111-0010 pattern in any orientation.

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

%S 1,1,1,1,1,1,19,31,655,1339,18309,48007,1442201,4567021,367217353,

%T 1460020323,228615404039,1133359885719,280150745688529,

%U 1717585325345099,785288102542995777,5945777223826707809

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1101-0111-0010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .1.1.0.0.0.0.1.1

%e .0.1.1.0.0.1.1.0

%e .1.1.0.0.0.0.1.1

%e .1.0.0.0.0.0.0.1

%e .0.0.1.0.0.1.0.0

%e .0.1.1.0.0.1.1.0

%e .1.1.0.0.0.0.1.1

%e .0.1.1.0.0.1.1.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008