#include <iostream>
#include <fstream>
using namespace std;
int main()
{
    int n, i, j, a, b, ct=0, r;
    ifstream f("fractii.in");
    f>>n;
    for(i=1; i<=n; i++)
        for(j=1; j<=n; j++)
        {
            a=i;
            b=j;
            do
            {
                r=a%b;
                a=b;
                b=r;
            }
            while(r!=0);
            if(a==1)
                ct++;
        }
    ofstream g("fractii.out");
    g<<ct;
    f.close();
    g.close();
}