..........................n个=1: 1
.......................n个=2: 1....., 1
....................n个=三: 三....., 1....., 1
................n个=4: 14....., 4....., 1....., 1
............n个=5: 147...., 17....., 4....., 1....., 1
........n个=6: 3462..., 164...., 18....., 4....., 1....., 1
..n个=7: 294314.., 3627...., 167...., 18....., 4....., 1....., 1