168期：01,02,04,06,09,10,11,12,13,14,16,17,19,20,24,26,27,28,30,31,33,34,35,41,43,45,47,49··（共半数）开28准
169期：01,02,03,05,06,07,08,09,10,11,12,14,16,22,24,28,30,31,32,33,34,35,38,39,43,46,47,48··（共半数）开39准
170期：01,02,03,08,11,12,13,14,17,21,22,24,25,26,29,31,34,36,37,38,39,41,42,43,44,45,47,49··（共半数）开？？！