A266125 - OEIS

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

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OFFSET

1,2

COMMENTS

Diagonal of A266131.

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

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.

Sequence in context: A330630 A282327 A263471 * A290708 A126631 A190981

Adjacent sequences: A266122 A266123 A266124 * A266126 A266127 A266128

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 21 2015

STATUS

approved