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