// Java solution for problem L
// Author: Lech Duraj

import java.util.Scanner;
public class l
{
  public static void main(String args[])
  {
       Scanner in = new Scanner(System.in); 
       int TT = in.nextInt();
       in.nextLine();
       while(TT>0)
       {
         TT--;
         int k = in.nextInt();
         in.nextLine();
         System.out.println((1 << k)-1);
      }
   }
}