169期：01,03,04,05,10,11,12,15,16,18,19,22,24,25,28,34,37,39,40,41,42,45,47,49··（共半数）开45准
170期：03,04,07,12,13,14,16,17,20,22,24,25,29,30,31,32,34,36,39,41,42,45,48,49··（共半数）开10错
171期：01,02,04,07,08,09,10,11,14,17,19,20,21,23,24,27,30,31,35,37,40,44,46,47··（共半数）开？？！