A266656 Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its northeast neighbor modulo 3 and the upper left element equal to 0.

2, 11, 91, 829, 8013, 80497, 830673, 8743293, 93437237, 1010633645, 11038556349, 121547316675, 1347523434675, 15026262949575, 168400839231879, 1895558909938005, 21419116890326757, 242855221965797157

Offset

1,1

Comments

Row 3 of A266655.

Links

R. H. Hardin, Table of n, a(n) for n = 1..87

Example

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

Crossrefs

Cf. A266655.

Sequence in context: A138552 A258221 A004677 * A094955 A352292 A143870

Adjacent sequences: A266653 A266654 A266655 * A266657 A266658 A266659

Keyword

nonn

Author

R. H. Hardin, Jan 02 2016

Status

approved