#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int i,j,n,nr=0,k,ok;
int main()
{f>>n;for (i=1;i<=n;i++)nr++;
for (i=2;i<=n;i++)
for (j=1;j<=n;j++)
{ok=1;
    for(k=2;k<=i/2;k++)if (i%k==0 &&j%k==0)ok=0;
if ((j%i!=0 && i%j!=0 ||j==1)&& ok==1)nr++;
}g<<nr;
f.close();
g.close();
    return 0;
}