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