for h in range(int(input())):
n=int(input())
k=(1<<n)-1
print(k)
#include<bits/stdc++.h>
using namespace std;
int main() {
int t;
cin >> t;
while(t--) {
int n;
cin >> n;
cout << (int)pow(2, n) -1 << endl;
}
return 0;
}
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