A147347 - OEIS

A147347

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01010-11111-00100 pattern in any orientation.

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

%S 1,1,1,1,7,1,25,9,149,33,5089,931,204509,26325,14205068,1129487,

%T 2130205171,121812575,553442984916,24953439069,285966193523255,

%U 9101315937099,294148529555161566,6619074013350903

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01010-11111-00100 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.1.0.0.0.0.1.0

%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

%e .0.1.0.0.0.0.1.0

%K nonn

%O 1,5

%A _R. H. Hardin_