%I #4 Mar 31 2012 12:36:28
%S 753,2421376,6385146382,16851142959473,44545247280268585,
%T 117783697209668555853
%N Half the number of nX6 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors
%C Column 6 of A197109
%e Some solutions for 4X4
%e ..1..0..0..0..1..2....1..0..0..0..1..2....1..0..0..0..2..2....1..0..0..0..1..0
%e ..0..0..1..0..2..0....0..0..1..0..0..0....0..0..1..0..0..0....0..0..1..0..2..0
%e ..0..0..1..2..0..2....0..0..1..1..1..3....0..0..1..0..0..1....0..0..1..2..2..0
%e ..1..0..0..0..3..1....1..0..0..0..3..0....1..0..0..2..3..1....1..0..0..1..3..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Oct 10 2011
|