猴子吃桃问题

2
3
11

22
6142

 
#include<iostream>
using namespace std;
int main()
{
    int n;
    int num;
    int c ;
    cin>>n;
    while(n--)
    {
        num =1;
        cin>>c;
        for(int i=0;i<c;i++)
        {

            num = (num +1)*2;
            
        }
        cout<<num<<endl;
    }

return 0;
}