A267165 Number of 4 X n arrays containing n copies of 0..4-1 with no element 1 greater than its west, southwest or northwest neighbor modulo 4 and the upper left element equal to 0.

6, 8, 260, 5826, 66670, 1168252, 31032592, 668814194, 12704325536, 268426296628, 6190148621390, 138489274808162, 3029996476900546, 68316028731518380, 1579464310919005876, 36414866362521221012, 837970629282115803146

Offset

1,1

Comments

Row 4 of A267163.

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Cf. A267163.

Sequence in context: A013242 A169971 A295429 * A000955 A027721 A264518

Adjacent sequences: A267162 A267163 A267164 * A267166 A267167 A267168

Keyword

nonn

Author

R. H. Hardin, Jan 11 2016

Status

approved