A189279 Number of nX8 array permutations with each element not moved or moved diagonally or antidiagonally by one.

1, 1156, 140625, 39100009, 8366395024, 1949419118656, 441979857682489, 101143260268999524, 23076937169939058561, 5270856026569766627569, 1203479485449751104976144, 274821392418575218931980321

Offset

1,2

Comments

Column 8 of A189280

Links

R. H. Hardin, Table of n, a(n) for n = 1..71

Example

Some solutions for 3X8
..0..1..9.12..4..5.13..7....0..8..9..3..4.12.15..7....9..8..2..3.11..5..6..7
..8.18.19..2..3..6.23.15....1..2.19.18..5.22.23..6....1..0.17..4.19.20.21.22
.16.17.11.10.20.21.22.14...16.17.11.10.20.21.13.14...16.10.18.12.13.14.15.23

Crossrefs

Sequence in context: A221813 A232004 A034979 * A264271 A264089 A264278

Adjacent sequences: A189276 A189277 A189278 * A189280 A189281 A189282

Keyword

nonn

Author

R. H. Hardin, Apr 19 2011

Status

approved