A184468 1/6 the number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last.

315, 2755, 14119, 53739, 247879, 904411, 2909367

Offset: 1

Author

R. H. Hardin Jan 15 2011

Keywords

• nonn

Comments

Diagonal of A184477

Examples

			Some solutions with a(1,1)=0 for 4X4
..0..2..1..0....0..2..1..0....0..1..2..0....0..0..1..1....0..2..1..0
..0..0..0..0....1..1..2..2....0..0..1..1....1..0..0..0....1..1..2..1
..1..1..1..1....2..2..1..1....1..0..1..0....1..2..1..1....1..2..2..1
..0..1..2..0....1..0..2..1....2..0..1..2....0..0..1..1....1..2..0..1