A189278 Number of nX7 array permutations with each element not moved or moved diagonally or antidiagonally by one.

1, 441, 28125, 3553225, 361199937, 39085685401, 4145792570105, 441979857682489, 47045498167288233, 5009341586507664025, 533335273492176377097, 56783742831233576420089, 6045707037507297581064681

Offset: 1

Author

R. H. Hardin Apr 19 2011

Keywords

• nonn

Comments

Column 7 of A189280

Examples

			Some solutions for 3X7
..0..1..2..3.12.13..6....0..7..2..3.10.11..6....0..9..2..3..4..5.12
..7.14..9.16.19..4..5...15.16..1..4..5.18.19...15.14..1.10.19..6.13
..8.15.10.17.18.11.20...14..9..8.17.12.13.20....8..7.16.17.18.11.20
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..182