A184475 1/6 the number of (n+2)X9 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last.

559305, 645837, 747735, 878625, 1219455, 1782585, 2909367

Offset: 1

Author

R. H. Hardin Jan 15 2011

Keywords

• nonn

Comments

Column 7 of A184477

Examples

			Some solutions with a(1,1)=0 for 4X9
..0..1..2..2..0..2..2..1..1....0..1..1..2..1..1..0..2..1
..0..1..1..2..0..1..2..1..0....0..1..0..2..1..0..0..1..0
..0..1..0..2..0..0..2..1..2....0..2..1..2..2..1..0..1..1
..0..1..2..2..0..2..2..1..1....0..1..1..2..1..1..0..2..1