A147377 - OEIS

A147377

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation.

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

%S 1,1,1,1,1,1,1,1,11,15,241,427,4185,8653,87751,203323,3730869,9866343,

%T 357089469,1093277721,68995024703,247016437881,25144161711781,

%U 105091314370945

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.0.0.0.0.0.0.0

%e .0.0.1.1.0.1.1.0.0

%e .0.0.1.0.0.0.1.0.0

%e .0.1.1.0.0.0.1.1.0

%e .0.1.0.0.0.0.0.1.0

%e .1.1.0.0.0.0.0.1.1

%K nonn

%O 1,9

%A _R. H. Hardin_