A189455 Number of 7Xn array permutations with each element moving zero or one space horizontally or diagonally

1, 610, 50000, 9712873, 1467726607, 248187289625, 40668908306516, 6765736745152657, 1121551510151218844, 186316582712584278456, 30941586267382205903880, 5140131519113981931817620

Offset

1,2

Comments

Row 7 of A189449

Links

R. H. Hardin, Table of n, a(n) for n = 1..140

Example

Some solutions for 7X3
..4..1..2....0..5..2....1..0..2....1..5..2....0..2..1....0..5..2....4..0..2
..3..0..5....7..3..1....4..8..5....3..0..4....7..8..5....3..4..1....3..5..1
.10..7..8....6..8..4....6..3..7...10..8..7...10..3..4....6.11..8....6..7..8
..9..6.11....9.11.10....9.10.11....9..6.11....9..6.11....9.10..7...10..9.11
.16.12.14...12.14.13...12.14.13...13.17.14...12.13.14...12.14.13...12.14.13
.15.17.13...16.15.17...19.15.17...19.12.16...15.20.17...15.20.17...15.16.17
.19.18.20...18.20.19...18.20.16...18.15.20...19.18.16...18.19.16...18.19.20

Crossrefs

Sequence in context: A045730 A072317 A220568 * A224171 A223862 A223985

Adjacent sequences: A189452 A189453 A189454 * A189456 A189457 A189458

Keyword

nonn

Author

R. H. Hardin Apr 22 2011

Status

approved