3,4,13,53,()。
A.213
B.425
C.690
D.710
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3,4,13,53,()。 A.213B.425C.690D.710
2,4,3,(),13/4,27/8,53/16。A.1 B.7/2 C.7/3 D.4
1,3,4,13,53,()A.267B.531C.690 D.891
1,3,4,13,53,()A.267B.531 C.690D.891
1,3,4,13,53,() A.267 B.531 C.690 D.891