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