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
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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