#include <iostream>
#include <cmath>
#include <cstdio>
#include <cstring>
using namespace std;
int main()
{
    int t,x;
    while(cin>>t){
        while(t--){
            cin>>x;
            int sum=3;
            for(int i=0;i<x;i++)
                sum=
 
(sum-1)*2;
            cout<<sum<<"\n";
        }
    }
    return 0;
}

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