n=4的一些解
..0..1..0..1..1..0....0..1..0..1..1..0....0..1..1..2..2..3....0..1..1..2..2..1
..2..3..2..3..2..3....2..3..2..3..2..3....0..3..3..0..0..1....2..3..3..0..0..3
..2..3..2..3..2..3....2..3..2..3..2..3....2..1..1..2..2..1....2..1..1..2..2..1
..0..1..0..1..0..1..1...0..1..0..1..0...0...0..3..0...0...3...0...0...3...0...3...3...0...0...0...1
..0..1..0..1..0..1....1..0..1..0..1..0....0..1..1..2..2..1....2..1..1..2..2..3
..3..3..2..2..3..2....2..2..3..2..2..3....2..3..3..0..0..3....2..3..3..0..0..3
|