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