3,5,9,17,33...

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3,5,9,17,33...

3,5,9,17,33...
3,5,9,17,33...

3,5,9,17,33...
3,5,9,17,33...也就是
2+1,4+1,8+1,16+1,32+1
通式为2^n+1

1+2^n

2n-1

2的1次方+1,2的2次方+1,2的3次方+1,2的4次方+1,2的5次方+1

2^n+1

A(n+1)是数列的第 n+1 项
A(n+1)=2*An-1
A(n+1)-1=2*(An-1)
[A(n+1)-1]/An-1)=2
后面就自己搞定吧