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

1,2

Comments

Column 7 of A189280

Links

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

Example

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

Crossrefs

Sequence in context: A232003 A221248 A220680 * A151656 A264088 A264277

Adjacent sequences: A189275 A189276 A189277 * A189279 A189280 A189281

Keyword

nonn

Author

R. H. Hardin, Apr 19 2011

Status

approved