A266075 Number of n X n integer arrays with each element equal to the number of horizontal and vertical neighbors differing from itself by exactly one.

1, 1, 4, 5, 29, 78, 466, 3907, 52773, 925875, 25789942

Offset

1,3

Comments

Diagonal of A266081.

Links

Table of n, a(n) for n=1..11.

Example

All solutions for n=4
..0..2..3..2....0..0..0..0....0..0..0..0....2..3..2..0....0..0..0..0
..0..3..4..3....2..3..2..0....0..0..0..0....3..4..3..0....0..2..3..2
..0..2..3..2....3..4..3..0....0..0..0..0....2..3..2..0....0..3..4..3
..0..0..0..0....2..3..2..0....0..0..0..0....0..0..0..0....0..2..3..2

Crossrefs

Cf. A266081.

Sequence in context: A092659 A002352 A042647 * A041273 A256623 A047169

Adjacent sequences: A266072 A266073 A266074 * A266076 A266077 A266078

Keyword

nonn

Author

R. H. Hardin, Dec 20 2015

Status

approved