A221434 Number of nX4 1..(max n,4) arrays with each row and column having unrepeated values

24, 216, 576, 576, 161280, 283046400, 782137036800, 3563924952268800, 25315180943034286080, 269169718618593283276800, 4137679434467601752260608000, 89264433387042486497787641856000

Offset

1,1

Comments

Column 4 of A221438

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

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

Crossrefs

Sequence in context: A050222 A169635 A269496 * A008655 A133754 A104670

Adjacent sequences: A221431 A221432 A221433 * A221435 A221436 A221437

Keyword

nonn

Author

R. H. Hardin Jan 16 2013

Status

approved