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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
2, 7, 39, 265, 1802, 12239, 84614, 597601, 4289844, 31138558, 227912351, 1679866698, 12457873439, 92883320659, 695746287346, 5232714491851, 39496475643074, 299071199295812, 2271081847307045, 17290623003826450 (list; graph; refs; listen; history; text; internal format)
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: A119602 A121752 A054133 * A032118 A125660 A112944

Adjacent sequences:  A266307 A266308 A266309 * A266311 A266312 A266313

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 26 2015

STATUS

approved

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Last modified November 14 15:10 EST 2019. Contains 329126 sequences. (Running on oeis4.)