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