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