A232369 Number of n X n 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, diagonally or antidiagonally, and no adjacent values equal.

1, 14, 586, 63744, 27133338, 47301712998, 319646954776850, 8418146420087467712, 876192348419528567402450

Offset: 1

Author

R. H. Hardin, Nov 23 2013

Keywords

• nonn

Comments

Diagonal of A232376

Examples

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