include

using namespace std;

int main() {

int n; cin >> n;

int peaches = 1;

for (int day = n; day >= 1; day--) {

peaches = (peaches + 1) * 2;

}

cout << peaches << endl; return 0; }

include

using namespace std;

int main() { int n; int sum=1; cin >> n;

for (int i=1;i<=n;i++){

sum=(sum+1)*2;

}

cout <<sum; return 0; }