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