#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>

#include <cstdio>
#include <cstdlib>
#include <cstring>

/// This Contest and Compile does not support C++11.
//#include <thread>
//#include <mutex>
//#include <condition_variable>
//#include <functional>

using namespace std;

int main()
{
    int n;
    cin>>n;
    for(int i=0;i<n;i++)
    {
        int a;
        cin>>a;
        int cc=3;
        while(a--)
        {
            cc=(cc-1)*2;
        }
        cout<<cc<<endl;
    }
    return 0;
}