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