[cpp]
#include"stdio.h"
#include"string.h"
#include"stdlib.h"
#include"math.h"
#include"queue"
#define N 31
typedef __int64 int64;
using namespace std;
int main()
{
int T;
int n;
scanf("%d",&T);
while(T--)
{
scanf("%d",&n);
printf("%d\n",(int)pow(2,n)-1);
}
return 0;
}