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