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