A239149 Number of (n+1)X(n+1) 0..3 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..3 introduced in row major order.

1, 2, 868, 135766, 821135900, 5427557363908, 486439997897622259, 105891766683961733641397

Offset: 1

Author

R. H. Hardin, Mar 11 2014

Keywords

• nonn

Comments

Diagonal of A239155

Examples

			Some solutions for n=4
..0..1..0..2..1....0..1..1..2..3....0..1..2..3..2....0..1..2..0..3
..0..1..0..2..1....0..1..1..2..3....0..1..2..3..2....0..1..2..0..3
..3..1..3..2..3....0..2..1..2..3....0..1..3..3..2....0..1..0..1..0
..3..1..3..2..3....3..2..2..3..2....0..2..3..0..2....0..2..0..1..0
..3..1..3..2..3....3..2..2..3..2....0..2..3..0..2....0..2..0..1..0