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A266573 Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its northwest or southwest neighbor modulo 3 and the upper left element equal to 0. 2
2, 5, 15, 109, 574, 2840, 13767, 71646, 390862, 2170370, 11989812, 66094738, 366119221, 2044786962, 11503587136, 65003352026, 368281990242, 2091514533360, 11909843102866, 68009104297282, 389348569168108, 2233795881384252 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A266572.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..73

EXAMPLE

Some solutions for n=6

..0..1..1..0..0..1....0..2..0..1..1..0....0..2..2..0..1..2....0..1..0..0..1..1

..2..2..0..1..2..0....2..0..1..2..0..1....2..0..1..2..0..1....2..0..0..2..2..0

..2..1..2..0..1..2....0..1..2..1..2..2....1..1..0..1..2..0....1..1..2..2..1..2

CROSSREFS

Cf. A266572.

Sequence in context: A032267 A191477 A196196 * A268121 A111790 A248125

Adjacent sequences:  A266570 A266571 A266572 * A266574 A266575 A266576

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 01 2016

STATUS

approved

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Last modified February 19 18:30 EST 2019. Contains 320327 sequences. (Running on oeis4.)