【例题】-8,15,39,65,94,128,170,( ) A.180 B.210 C.225 D.256
【例题】2,3,13,175,( ) A.30625 B.30651 C.30759 D.30952
【例题】1,2,3,7,46,( ) A.2109 B.1289 C.322 D.147
【例题】1,1,8,16,7,21,4,16,2,( ) A.10 B.20 C.30 D.40