A265986 Number of n X n integer arrays with each element equal to the number of horizontal and antidiagonal neighbors not equal to itself.

1, 1, 6, 2, 1, 5, 422, 243, 299, 1712, 91080, 155636, 749259, 5409278, 253679426, 2921924313, 9771922764942

Offset

1,3

Comments

Diagonal of A265991.

Links

Table of n, a(n) for n=1..17.

Example

Some solutions for n=6
..1..2..2..1..1..2....1..2..2..1..1..2....1..2..2..1..1..2....0..0..0..0..0..0
..1..1..1..1..4..2....1..1..1..1..4..1....1..1..1..1..4..2....0..0..0..0..0..0
..1..4..1..1..1..1....1..4..1..1..1..2....1..4..1..1..1..1....0..0..0..0..0..0
..2..1..1..1..4..1....2..1..1..1..4..1....1..1..1..1..4..1....0..0..0..0..0..0
..1..4..1..1..1..1....1..4..1..1..1..1....2..4..1..1..1..1....0..0..0..0..0..0
..2..1..1..2..2..1....2..1..1..2..2..1....2..1..1..2..2..1....0..0..0..0..0..0

Crossrefs

Cf. A265991.

Sequence in context: A224518 A375741 A363684 * A334942 A217909 A334943

Adjacent sequences: A265983 A265984 A265985 * A265987 A265988 A265989

Keyword

nonn

Author

R. H. Hardin, Dec 19 2015

Status

approved