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