A189246 Number of n X n array permutations with each element making zero or one king moves.

1, 24, 2961, 7396009, 194762146816, 71437033921822425, 330453235652954061843137, 20019535342827950668977079681024, 15708505438679657289806294970498013833233, 160414174990431372841568811126249791614409201147297

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Diagonal of A189254.

Sequence in context: A090444 A205795 A222852 * A001512 A217574 A272179

Adjacent sequences: A189243 A189244 A189245 * A189247 A189248 A189249

Keyword

nonn

Author

R. H. Hardin, Apr 19 2011

Extensions

a(9)-a(10) from Pontus von Brömssen, Sep 03 2024

Status

approved