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A267989 Number of nX3 arrays containing 3 copies of 0..n-1 with row sums and column sums nondecreasing. 0
1, 5, 145, 7477, 760736, 122958209, 28706571457 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A267990.

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A267990.

Sequence in context: A254711 A273920 A076218 * A307902 A281427 A294360

Adjacent sequences:  A267986 A267987 A267988 * A267990 A267991 A267992

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 23 2016

STATUS

approved

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Last modified September 22 11:29 EDT 2020. Contains 337289 sequences. (Running on oeis4.)