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

Author

R. H. Hardin Apr 19 2011

Keywords

• nonn

Comments

Column 8 of A189280

Examples

			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
		

Links

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