A189178 Number of n X n array permutations with each element making a single king move

0, 9, 192, 251720, 1339732352, 108943637068673, 76260881288534294528, 594579828469677562655346609

Offset

1,2

Comments

Diagonal of A189186

Links

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

Example

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

Crossrefs

Sequence in context: A332119 A261826 A184688 * A297517 A116877 A196959

Adjacent sequences: A189175 A189176 A189177 * A189179 A189180 A189181

Keyword

nonn

Author

R. H. Hardin Apr 18 2011

Status

approved