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