305期：04,05,07,08,10,11,12,16,18,19,20,23,24,26,28,29,30,32,33,34,35,38,39,40,44,45,46,48··（共半数）开16准
306期：04,05,06,07,11,12,13,16,18,21,22,23,24,25,26,27,28,29,30,33,36,37,38,40,41,42,48,49··（共半数）开31错
307期：02,03,04,05,06,07,09,12,14,16,18,21,24,25,26,28,29,31,32,33,35,38,41,42,44,46,48,49··（共半数）开22错
308期：01,02,03,06,07,08,09,10,12,13,14,15,16,17,18,20,23,25,27,29,30,33,34,37,39,43,44,49··（共半数）开？？！