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