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