#include<fstream>
using namespace std;
int n,i;
unsigned long long rez;
int main()
{
    ifstream f("patrate2.in");
    ofstream g("patrate2.out");
    f>>n;
    if(n==1)
    rez=2;
    if(n>1)
    {
        for(i=2;i<=n;i++)
        rez=(rez+2)*16;
    }
    g<<rez;
    return 0;
}