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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

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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