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A221433 Number of nX3 1..(max n,3) arrays with each row and column having unrepeated values 1
6, 12, 12, 576, 66240, 15321600, 5411750400, 2834466324480, 2102110586634240, 2130686007341875200, 2866934087721639936000, 4998512704699099643904000, 11064050379110706817558118400, 30552674703715743883429360435200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A221438.

REFERENCES

RJ Stones, S Lin, X Liu, G Wang, On Computing the Number of Latin Rectangles, Graphs and Combinatorics, Graphs and Combinatorics (2016) 32:1187-1202; DOI 10.1007/s00373-015-1643-1

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..58

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A221438.

Sequence in context: A028588 A327569 A338560 * A335485 A004749 A107687

Adjacent sequences:  A221430 A221431 A221432 * A221434 A221435 A221436

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 16 2013

STATUS

approved

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Last modified November 28 22:15 EST 2021. Contains 349415 sequences. (Running on oeis4.)