A188960 Number of nX3 array permutations with each element moved by a city block distance of no more than three

6, 720, 229080, 75764664, 17316382188, 3909049448304, 924052205725920, 222219070309228084, 53009406781203828708, 12600147078274878009900, 2996409860247302687479312, 713212717944705067662180768

Offset

1,1

Comments

Column 3 of A188962

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

Some solutions for 4X3
..0..5..1....0..5..1....0..5..1....0..5..1....0..5..1....0..5..1....0..5..1
..2.10..3....2..9..4....6..2..4....7..9..8....2..9..6....8..7..3....8..3..7
..4..8.11....3..8.11....9..7..3....3..2.11....7..3.11....6..4..9...10..2.11
..9..7..6....7.10..6...10..8.11....6..4.10....8..4.10...11.10..2....4..6..9

Crossrefs

Sequence in context: A289367 A014525 A289747 * A100732 A003923 A002204

Adjacent sequences: A188957 A188958 A188959 * A188961 A188962 A188963

Keyword

nonn

Author

R. H. Hardin Apr 14 2011

Status

approved