n=4的一些解
..0..1..1..0....0..0..1..2....0..0..0..0....0..0..1..0....0..0..0..0
..0..2..0..2....1..2..1..0....0..0..0..0....1..2..2..3....1..2..3..1
..0..1..3..2....2..3..3..3....1..2..1..3....1..3..0..2....2..0..1..0
..3..1..2..0....1..2..0..2....1..3..3..2....1..2..3..2....3..2..2..1
..0..1..0..1....2..3..2..1....1..0..1..1....0..1..0..3....2..1..3..3
|