A189608 Number of nX7 array permutations with each element not moving, or moving one space E, S or NW

1, 129, 3248, 108785, 3414588, 107793872, 3394457868, 106717857552, 3352763054744, 105288130659056, 3305643786649888, 103772022994114688, 3257440136563770512, 102248757981895108688, 3209460671164514648880

Offset

1,2

Comments

Column 7 of A189610

Links

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

Example

Some solutions for 3X7
..0..1..2..3..4..5..6....0..1.10..2.12..4..6....0..1..2.11..4.13..6
.15..8..9.18.11.20.12....7.16..8..3.11..5.13....7..8.17..3.10..5.12
..7.14.16.10.17.19.13...14.15..9.17.18.19.20...14.15..9.16.18.19.20

Crossrefs

Sequence in context: A279640 A327337 A305722 * A168067 A232034 A334360

Adjacent sequences: A189605 A189606 A189607 * A189609 A189610 A189611

Keyword

nonn

Author

R. H. Hardin Apr 24 2011

Status

approved