#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cmath>
#include<algorithm>
#include<cstdlib>
#include<queue>
#include<set>
#include<vector>
using namespace std;
int t,n;
int main()
{
      scanf("%d",&t);
      while(t--)
      {
            scanf("%d",&n);
            printf("%d\n",(1<<n)-1);
      }
      return 0;
}