#include <iostream>
#include <fstream>

using namespace std;

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

int main()
{
    int N,i,j,k=0,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=a-b;
                }
                else
                {
                    b=b-a;
                }
            }
            if (a==1)
            {
                k++;
            }
        }
    }
    g<<k;
    return 0;
}