n=4的一些解
..0....4....7....2....1....2....0....6....1....7....0....4....1....4....0....0
..4....5....0....4....4....5....0....5....4....2....1....5....0....7....2....1
..4....2....7....5....0....6....3....5....1....0....4....2....7....3....7....5
..3....4....4....4....5....1....2....6....4....2....3....2....1....1....6....1
..7....7....3....0....6....5....6....0....1....2....7....7....5....0....6....2
..1....0....6....5....0....7....5....2....6....3....6....1....0....1....1....7
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