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

Author

R. H. Hardin Apr 22 2011

Keywords

• nonn

Comments

Row 7 of A189449

Examples

			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
		

Links

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