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A211708 Number of n X 3 nonnegative integer arrays with new values 0 upwards introduced in row major order and every value unique in its row and column. 0
1, 18, 588, 30240, 2277600, 234440280, 31448589480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A211709.

LINKS

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

EXAMPLE

Some solutions for n=4:

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

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

..1..2..3....2..0..1....2..3..0....1..2..0....3..2..1....2..3..4....2..3..1

..3..0..1....3..4..5....3..2..1....2..3..4....2..3..0....3..5..6....3..2..0

CROSSREFS

Sequence in context: A254381 A177098 A133401 * A253826 A061079 A180822

Adjacent sequences:  A211705 A211706 A211707 * A211709 A211710 A211711

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 19 2012

STATUS

approved

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Last modified May 26 00:32 EDT 2020. Contains 334613 sequences. (Running on oeis4.)