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