A189432 Number of nX6 array permutations with each element not moving, or moving one space N, SW or SE.

1, 13, 181, 2413, 40065, 606201, 9557077, 150278792, 2367212857, 37358187521, 589449930573, 9305507958493, 146913309982185, 2319624020512093, 36626205645266813, 578327113990185529, 9131891816444663056

Offset: 1

Author

R. H. Hardin Apr 22 2011

Keywords

• nonn

Comments

Column 6 of A189435

Examples

			Some solutions for 3X6
..6..1..2..9.10..5....6..7..2..3.10.11....6..7..8..3..4..5....0..7..8..9.10.11
.12..0..8..4..3.11....1..0..8..9..5..4....1..0.14..2.10.11....1.13..3..2..5..4
..7.13.14.15.16.17...12.13.14.15.16.17...12.13..9.15.16.17...12..6.14.15.16.17
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200