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