#include<stdio.h>
#include<math.h>
int main()
{
unsigned int n,i;
unsigned __int64 sum=0;
scanf("%d",&n);
for(i=0;i<n;i++)
sum += pow(2,i);
printf("%I64u\n",sum);
return 0;
}
#include<stdio.h>
#include<math.h>
int main()
{
unsigned int n,i;
unsigned __int64 sum=0;
scanf("%d",&n);
for(i=0;i<n;i++)
sum += pow(2,i);
printf("%I64u\n",sum);
return 0;
}