3,7,17,115,()
A.132
B.277
C.195l
D.1955
3 7 17 115() A132. B.277 C.1951 D.1955
3,7,17,115,() A.132 B.277 C.1951 D.1955
3,7,17,115,()A.132 B.277 $_$C.1951 D.1955
3, 7, 17, 115, ()。A.132 B.227C. 1951 D.1955
3, 7, 17, 115, ()A.132 B.277 C.1 951 D.1 955