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