#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int n,p,q,G;
int prim(int a, int b)
{
    while(a!=b) { if(a>b) a=a-b;
                  else b=b-a;
                }
    if(a==1) return 1;
    return 0;
}
int main()
{
    f>>n;
    for(p=1;p<=n;p++) for(q=1;q<=n;q++) if((p==1 or q==1) or (p==1 and q==1)) G++;
                                          else if(prim(p,q)) G++;
    g<<G<<'\n';
    return 0;
}