A266064 Number of nX4 integer arrays with each element equal to the number of horizontal, vertical, diagonal and antidiagonal neighbors exactly one smaller than itself.

5, 89, 81, 525, 8262, 25663, 148323, 1480037, 7361668, 43625889, 337487030, 1992491986, 12259297662, 84919942819, 531642104603, 3345439670726, 22164717425170, 141438239886755, 900411960327132, 5860940525461256

Offset

1,1

Comments

Column 4 of A266067.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..0..2..1..0....0..2..2..0....1..1..2..0....0..1..2..0....1..2..1..2
..1..2..3..2....2..1..1..2....0..1..2..0....2..3..3..1....0..2..0..1
..2..3..0..1....2..1..1..2....2..2..3..0....1..2..3..2....0..2..2..2
..1..0..2..1....0..2..2..0....0..1..2..1....0..2..1..0....1..2..1..0

Crossrefs

Cf. A266067.

Sequence in context: A221465 A184239 A054954 * A106971 A136618 A138700

Adjacent sequences: A266061 A266062 A266063 * A266065 A266066 A266067

Keyword

nonn

Author

R. H. Hardin, Dec 20 2015

Status

approved