Some solutions for n=6
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..3....0....5....5....1....1....3....1....1....2....5....1....2....4....1....4
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..0....3....6....0....2....5....3....6....4....0....5....1....3....6....5....2
..5....1....4....2....2....4....0....4....5....3....3....2....1....3....0....5
..4....2....3....2....0....6....2....3....6....6....2....5....0....1....3....0
..3....6....6....0....6....3....5....2....3....0....5....3....0....0....5....4
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