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