1,4,12,32,80,( ),448A.162 B.182 C.192 D.212
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![1,4,12,32,80,( ),448A.162 B.182 C.192 D.212](/uploads/image/z/542312-8-2.jpg?t=1%2C4%2C12%2C32%2C80%2C%EF%BC%88+%EF%BC%89%2C448A.162+++B.182+++C.192+++D.212)
1,4,12,32,80,( ),448A.162 B.182 C.192 D.212
1,4,12,32,80,( ),448
A.162 B.182 C.192 D.212
1,4,12,32,80,( ),448A.162 B.182 C.192 D.212
3 前一个数*2+2的5次
1
1*2+2=4
4*2+4=12
12*2+8=32
32*2+16=80
80*2+32=192
192*2+64=448