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A266571 Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its northwest or southwest neighbor modulo n and the upper left element equal to 0. 0
1, 1, 15, 2320, 729874, 466056593, 515679132204, 897699718056452 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 of A266572.

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

..0..2..1....0..3..1....0..2..2....0..0..3....0..2..1....0..2..3....0..2..3

..3..2..2....1..3..2....2..3..0....1..0..2....0..3..1....2..0..1....3..0..0

..0..3..1....0..0..1....1..1..1....1..3..2....3..2..1....2..1..3....1..1..2

..0..3..1....2..3..2....3..3..0....1..3..2....3..2..0....1..0..3....2..3..1

CROSSREFS

Cf. A266572.

Sequence in context: A222881 A229844 A208171 * A308389 A278410 A211902

Adjacent sequences:  A266568 A266569 A266570 * A266572 A266573 A266574

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 01 2016

STATUS

approved

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Last modified May 19 05:04 EDT 2022. Contains 353826 sequences. (Running on oeis4.)