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