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A221438 T(n,k)=Number of nXk 1..(max n,k) arrays with each row and column having unrepeated values 6
1, 2, 2, 6, 2, 6, 24, 12, 12, 24, 120, 216, 12, 216, 120, 720, 5280, 576, 576, 5280, 720, 5040, 190800, 66240, 576, 66240, 190800, 5040, 40320, 9344160, 15321600, 161280, 161280, 15321600, 9344160, 40320, 362880, 598066560, 5411750400, 283046400 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

....1.......2..........6...........24............120............720

....2.......2.........12..........216...........5280.........190800

....6......12.........12..........576..........66240.......15321600

...24.....216........576..........576.........161280......283046400

..120....5280......66240.......161280.........161280......812851200

..720..190800...15321600....283046400......812851200......812851200

.5040.9344160.5411750400.782137036800.20449013760000.61479419904000

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..83

EXAMPLE

Some solutions for n=3 k=4

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

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

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

CROSSREFS

Diagonal is A002860

Column 1 is A000142

Column 2 is A082491

Sequence in context: A257251 A068555 A167556 * A327991 A193322 A165460

Adjacent sequences:  A221435 A221436 A221437 * A221439 A221440 A221441

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 16 2013

STATUS

approved

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Last modified December 8 11:31 EST 2021. Contains 349596 sequences. (Running on oeis4.)