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31准
171期：07,10,11,12,13,14,15,16,17,19,20,21,25,26,27,28,29,30,33,35,37,38,39,44,45,47,48,49··（共半数）开24错
172期：02,05,06,10,12,14,15,17,18,19,20,21,22,24,25,26,27,28,29,32,33,34,36,41,42,43,45,46··（共半数）开？？！