#include<iostream>
using namespace std;
int main(){
	int n,a=1;
	cin>>n;
	for(int i=1;i<=n;i++)
		a=(a+1)*2;
	cout<<a;
	return 0;
}

////

#include<bits/stdc++.h>//网上查到的万能头//

    using namespace std;

    int main()

    {

        int n;
        cin >> n ;

        int sum = 1;

        while(n--)

        {

            sum = (sum + 1)*2;

        }
        cout << sum << endl;

        return 0;

    }