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