A266310 Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its west neighbor modulo 3 and the upper left element equal to 0.

2, 7, 39, 265, 1802, 12239, 84614, 597601, 4289844, 31138558, 227912351, 1679866698, 12457873439, 92883320659, 695746287346, 5232714491851, 39496475643074, 299071199295812, 2271081847307045, 17290623003826450

Offset

1,1

Comments

Row 3 of A266309.

Links

R. H. Hardin, Table of n, a(n) for n = 1..83

Example

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

Crossrefs

Cf. A266309.

Sequence in context: A054133 A330470 A364336 * A032118 A369087 A125660

Adjacent sequences: A266307 A266308 A266309 * A266311 A266312 A266313

Keyword

nonn

Author

R. H. Hardin, Dec 26 2015

Status

approved