A183818 - OEIS

%I #4 Mar 31 2012 12:35:54

%S 262144,536415300,1050517114472,2096961683069192,4156740912572653752

%N 1/81 the number of (n+1)X8 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor

%C Column 7 of A183819

%e Some solutions with upper left block zero for 3X8

%e ..0..0..0..2..0..2..0..2....0..0..0..1..0..1..0..1....0..0..0..1..0..0..0..2

%e ..0..0..1..1..0..2..1..0....0..0..1..1..0..2..1..0....0..0..1..2..0..2..1..0

%e ..2..1..0..1..0..1..0..1....1..1..0..0..0..0..0..0....1..1..1..2..0..1..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2011