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