A188806 Number of nX3 array permutations with each element remaining in its original row or its original column

6, 82, 2720, 194568, 26101232, 5919004912, 2103543163584

Offset

1,1

Comments

Column 3 of A188808

Links

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

Example

Some solutions for 3X3
..6..0..8....2..0..1....1..4..8....6..0..8....0..4..8....6..1..5....6..2..1
..5..1..4....3..4..5....3..5..2....5..4..3....5..7..2....3..7..4....5..4..3
..3..7..2....6..8..7....0..6..7....7..1..2....3..1..6....0..8..2....0..7..8

Crossrefs

Sequence in context: A360346 A251584 A068253 * A155811 A239170 A112462

Adjacent sequences: A188803 A188804 A188805 * A188807 A188808 A188809

Keyword

nonn

Author

R. H. Hardin Apr 11 2011

Status

approved