#include <iostream>
#include <fstream>

using namespace std;

ifstream f("fractii.in");
ofstream g("fractii.out");

int main()
{
    int N,i,j,k=0,r,a,b;
    f>>N;
    for (i=1;i<=N;i++)
    {
        for (j=1;j<=N;j++)
        {
            a=i;
            b=j;
            while (b)
            {
                r=a%b;
                a=b;
                b=r;
            }
            if (a==1)
            {
                k++;
            }
        }
    }
    g<<k;
    return 0;
}