A266125 Number of n X n integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself.

1, 9, 77, 572, 62104, 13689944, 10444421518

Offset: 1

Author

R. H. Hardin, Dec 21 2015

Keywords

• nonn

Comments

Diagonal of A266131.

Examples

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

Crossrefs

Cf. A266131.