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