A188952 Number of n X n array permutations with each element moved no more than a city block distance of two

1, 24, 29172, 504690017, 229188213745576

Offset

1,2

Comments

Diagonal of A188958

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A188961 A153303 A272095 * A258901 A062322 A100733

Adjacent sequences: A188949 A188950 A188951 * A188953 A188954 A188955

Keyword

nonn

Author

R. H. Hardin Apr 14 2011

Status

approved