func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int n, m;     cin >> n;     cout << (((1ll << (n / 2)) - 1) * 2) <<   n ;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     ;     int t = 1;     cin >> t;     while (t--) solve();     return 0;   }   