|
|
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
|
|
|
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
|
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|