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