241期：03,04,05,07,08,09,10,11,17,18,21,22,25,26,28,31,33,34,42,43,44,46,47,49··（共半数）开49准
242期：01,02,04,05,07,08,14,18,19,21,22,23,25,26,29,30,32,35,36,37,41,42,43,46··（共半数）开09错
243期：01,02,03,04,06,07,09,11,12,13,14,15,21,22,27,28,32,35,39,41,44,45,46,49··（共半数）开21准
244期：01,03,06,08,09,11,15,16,17,19,20,21,24,25,30,35,38,39,40,41,42,43,48,49··（共半数）开46错
245期：05,08,09,10,11,12,15,16,17,18,19,22,24,27,36,37,38,39,42,43,44,45,46,48··（共半数）开？？！