A221436 Number of nX6 1..(max n,6) arrays with each row and column having unrepeated values

720, 190800, 15321600, 283046400, 812851200, 812851200, 61479419904000

Offset

1,1

Comments

Column 6 of A221438

Links

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

Example

Some solutions for n=3
..1..6..2..3..5..4....1..3..2..5..4..6....1..3..2..6..4..5....1..4..2..5..3..6
..4..3..1..6..2..5....2..1..4..6..5..3....2..1..5..4..3..6....6..3..5..2..1..4
..6..2..4..5..3..1....6..5..1..3..2..4....5..6..4..3..1..2....2..6..4..1..5..3

Crossrefs

Sequence in context: A047803 A166765 A008411 * A239184 A003439 A222158

Adjacent sequences: A221433 A221434 A221435 * A221437 A221438 A221439

Keyword

nonn

Author

R. H. Hardin Jan 16 2013

Status

approved