247期：04,07,08,09,10,12,13,16,17,18,19,21,24,25,26,27,28,29,31,36,38,41,42,43,44,45,47,48··（共半数）开29准
248期：03,04,05,06,09,10,11,14,15,16,17,20,21,23,24,27,28,29,30,33,39,40,43,44,45,47,48,49··（共半数）开15准
249期：02,05,08,10,13,14,15,16,17,20,21,23,24,26,27,28,29,30,31,33,35,37,38,41,44,46,47,48··（共半数）开02准
250期：01,02,03,04,05,08,10,12,14,15,16,18,20,23,24,25,26,27,28,31,33,34,35,36,41,46,47,49··（共半数）开04准
251期：02,03,04,07,09,12,13,15,16,17,19,21,22,24,25,27,28,29,31,35,38,40,41,42,43,45,47,48··（共半数）开41准
252期：01,02,04,07,08,12,15,17,18,19,21,23,26,27,28,30,31,32,35,36,37,38,40,44,45,46,48,49··（共半数）开24错
253期：02,04,05,06,08,09,10,12,13,15,16,19,20,22,24,26,27,28,35,36,38,39,42,43,44,45,47,49··（共半数）开19准
254期：02,03,04,05,07,08,13,14,15,16,17,18,19,20,21,25,28,30,32,33,34,35,38,42,46,47,48,49··（共半数）开13准
255期：01,03,05,06,07,08,09,10,12,13,15,16,19,21,30,31,32,33,34,36,38,39,40,42,43,45,47,48··（共半数）开33准
256期：01,02,03,06,12,16,18,20,21,22,23,24,25,26,27,30,31,32,35,36,37,39,40,41,42,43,47,49··（共半数）开35准
=============10中9=============
257期：02,04,05,10,11,12,13,14,15,19,22,24,27,28,31,33,34,35,36,37,38,39,40,43,45,46,48,49··（共半数）开48准
258期：02,04,05,06,08,09,10,12,16,17,18,19,24,25,28,29,30,31,32,34,36,37,39,40,41,43,46,47··（共半数）开12准
259期：03,06,08,09,10,11,13,20,23,24,25,26,27,29,33,34,35,36,38,39,41,42,43,44,45,46,47,49··（共半数）开45准
260期：01,02,03,06,07,08,10,13,14,15,16,17,18,20,22,24,25,26,27,29,31,33,36,38,39,44,45,47··（共半数）开25准
261期：03,05,06,07,10,14,15,16,18,19,20,23,24,26,28,30,31,32,35,36,37,38,39,41,44,45,48,49··（共半数）开49准
262期：04,06,08,11,13,15,16,17,20,24,25,27,28,31,32,33,34,35,36,37,38,39,40,41,43,46,47,48··（共半数）开03错
263期：02,04,07,12,13,15,22,23,24,25,26,27,30,31,32,33,34,36,38,40,42,43,44,45,46,47,48,49··（共半数）开34准
264期：01,03,04,06,09,12,14,15,17,19,20,22,23,25,27,28,29,31,32,33,34,36,38,41,42,43,47,49··（共半数）开27准
265期：01,02,03,05,07,08,10,11,13,15,18,19,22,23,25,27,28,29,30,31,33,36,38,40,41,43,46,49··（共半数）开30准
266期：01,06,07,08,10,11,13,14,16,17,18,19,20,22,23,27,28,29,31,32,34,36,39,40,43,44,47,48··（共半数）开40准
=============10中9=============
267期：01,02,03,04,07,08,09,10,12,13,14,19,21,22,23,24,30,32,36,37,38,39,40,43,44,45,47,48··（共半数）开22准
268期：01,03,04,05,08,09,10,11,14,15,16,17,21,27,29,30,31,32,33,34,35,36,38,41,42,44,46,47··（共半数）开32准
269期：01,02,04,05,06,08,13,15,17,19,20,21,23,25,27,28,29,31,33,35,38,39,40,41,44,45,46,48··（共半数）开37错
270期：01,05,09,10,11,13,15,19,20,21,22,24,25,26,28,29,30,31,32,33,36,39,40,41,42,44,46,47··（共半数）开？？！