#include<iostream>
#include<fstream>
using namespace std;
int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    int N,x,y,P,Q,c=0;
    f>>N;
    for(P=1;P<=N;P++)
        {
            for(Q=1;Q<=N;Q++){
                x=P;
                y=Q;
            while(x!=y)
            {
                if(x>y)
                    x-=y;
                else
                    y-=x;
            }
            if(x==1)
              c++;
              }
        }
        g<<c;
     return 0;
}