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