243期：01,02,03,04,05,06,07,08,13,16,17,18,21,22,23,24,25,31,34,38,39,40,41,42,43,44,46,47··（共半数）开42准
244期：03,04,05,07,09,10,11,16,17,18,19,21,24,25,31,32,33,36,38,39,40,41,43,44,45,46,47,48··（共半数）开43准
245期：01,03,04,06,08,09,10,11,12,13,14,15,16,17,20,22,24,28,29,36,37,40,41,43,45,46,48,49··（共半数）开02错
246期：05,06,07,08,10,11,13,14,15,17,18,19,20,21,23,27,29,30,33,34,35,41,42,43,44,46,47,48··（共半数）开32错
247期：01,03,05,06,09,11,12,16,17,18,19,20,21,23,25,26,27,31,33,37,38,40,41,42,43,45,48,49··（共半数）开？？！