???????,??????????????,??????????????????
??????????????????????????????
???????????1??2 ???10???????????????
???????????2??3 ???14???????????????
???????????3??4 ???48???????????????
???????????4??5 ???85???????????????
???????????5??6???222???????????????
???????????6??7???585???????????????
???????????7??8???1260???????????????
???????????8??9???1825-2000?????????????
???????????9??10???3200-3500?????????????
???????????б??????????????????????????????????????????????С???????50-100?????????~??????硣