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