A183518 Number of n X n 0..2 arrays with each element equal to either the sum mod 3 of its horizontal and vertical neighbors or the sum mod 3 of its diagonal and antidiagonal neighbors.

1, 9, 101, 3507, 371691, 89738569

Offset: 1

Author

R. H. Hardin Jan 05 2011

Keywords

• nonn

Comments

Diagonal of A183526

Examples

			Some solutions for 3X3
..0..0..2....2..2..2....1..1..1....0..0..0....0..1..0....2..0..0....1..2..0
..0..2..0....0..1..0....1..1..0....0..1..0....2..1..2....2..0..1....1..1..1
..0..0..0....0..0..0....1..0..1....1..0..0....1..1..0....0..0..1....0..2..0