A186967 Number of 4-turn queen's tours on an n X n board summed over all starting positions.

0, 24, 1344, 10440, 43424, 130592, 320880, 686384, 1326848, 2374152, 3996832

Offset: 1

Author

R. H. Hardin Mar 01 2011

Keywords

• nonn

Comments

Row 4 of A186965

Examples

			Some solutions for 3X3
..0..0..4....4..0..0....0..0..0....0..4..0....3..2..1....0..2..0....0..3..0
..0..0..2....0..3..1....0..2..1....2..1..3....0..0..0....4..0..3....1..4..2
..0..1..3....0..0..2....4..3..0....0..0..0....4..0..0....0..1..0....0..0..0