341期：01,02,04,07,08,12,13,16,18,20,24,31,32,34,36,37,38,39,40,41,42,45,48,49··（共半数）开18准
342期：03,04,06,09,12,16,17,18,19,20,24,25,28,29,31,33,34,36,38,39,40,41,46,48··（共半数）开49错
343期：01,04,05,06,07,10,12,13,14,15,20,22,25,26,27,34,40,42,43,44,46,47,48,49··（共半数）开？？！