login
A266095
Number of n X n integer arrays with each element equal to the number of horizontal and antidiagonal neighbors exactly one smaller than itself.
0
1, 5, 64, 929, 53442, 12401485, 6206090116, 5955851105844, 17910530164706984, 181493083347714402782, 4372527304675102033719740, 234910588564744761536499928490
OFFSET
1,2
COMMENTS
Diagonal of A266101.
EXAMPLE
Some solutions for n=4
..0..0..2..1....1..0..1..1....0..1..2..0....0..0..2..1....0..2..1..2
..1..1..0..1....1..2..0..1....2..1..0..0....1..1..0..1....1..0..1..1
..2..1..2..0....0..2..1..1....1..0..2..1....1..0..1..1....1..2..0..0
..1..0..0..1....1..0..0..1....1..1..0..0....1..2..0..0....0..0..0..1
CROSSREFS
Cf. A266101.
Sequence in context: A178295 A054937 A302993 * A255523 A193222 A274265
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 21 2015
STATUS
approved