281期：《《01,03,04,05,11,14,16,17,18,26,28,32,35,42,46,48》》开：17√
282期：《《01,04,09,10,11,20,21,22,26,29,30,33,35,40,46,49》》开：30√
283期：《《02,03,04,09,13,16,18,21,24,25,29,32,37,40,46,49》》开：39x
284期：《《07,10,13,15,17,18,20,25,26,35,36,41,43,46,47,49》》开：17√
285期：《《03,04,09,10,11,15,17,24,27,28,30,35,38,39,47,48》》开：中？
