A266127 Number of n X 4 integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself.

5, 49, 117, 572, 4336, 19750, 102201, 620508, 3041449, 16217839, 93738044, 476322405, 2546428711, 14301936049, 74467601183, 398781566199, 2199927226366, 11619003130461, 62319679692416, 340185096129345, 1811374715345253

Offset

1,1

Comments

Column 4 of A266131.

Links

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

Example

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

Crossrefs

Cf. A266131.

Sequence in context: A298773 A298580 A299572 * A343690 A298394 A299512

Adjacent sequences: A266124 A266125 A266126 * A266128 A266129 A266130

Keyword

nonn

Author

R. H. Hardin, Dec 21 2015

Status

approved