2,12,121,1121,11211,()
A.11121
B.11112
C.112111
D.111211
1,11,21,1211,() A、11211;B、111211;C、111221;D、11
1,2,9,121,() A.251B.441C.16900D.960
1,2,9,121,()。 A.210B.16900C.289 D.25600
2, 5, 12, 29, 70, ()。A.100 B.121 C.144 D.169
1,2,9,121,()。A.251B.441 C.16900D.960
2,12,121,1121,11211,()。A.11121B.11112C.112111D.111211