A266130 Number of nX7 integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself.

25, 2141, 11044, 347576, 16386099, 325554385, 10444421518, 364864463172, 9780785065374, 322718526988333, 10659390930051828, 315717305995251778

Offset

1,1

Comments

Column 7 of A266131.

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Cf. A266131.

Sequence in context: A197408 A197430 A195272 * A363192 A222276 A304323

Adjacent sequences: A266127 A266128 A266129 * A266131 A266132 A266133

Keyword

nonn

Author

R. H. Hardin, Dec 21 2015

Status

approved