A189304 Number of n X n array permutations with each element moving zero or one space diagonally, horizontally or vertically

1, 14, 960, 654049, 3373180708, 146610388175180, 52114841233680255776, 153220700522675894994117846

Offset

1,2

Comments

Diagonal of A189312

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for 3X3
..3..2..1....1..0..2....0..1..2....3..2..1....0..1..5....3..5..1....4..0..2
..0..4..8....7..5..8....7..4..5....6..0..5....4..8..2....0..4..2....7..3..1
..7..6..5....3..6..4....3..6..8....7..4..8....3..6..7....7..6..8....6..8..5

Crossrefs

Sequence in context: A055152 A171183 A064729 * A123178 A208318 A349737

Adjacent sequences: A189301 A189302 A189303 * A189305 A189306 A189307

Keyword

nonn

Author

R. H. Hardin Apr 19 2011

Status

approved