#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    int x,i,j,c,a,b,r;
    f>>x;
    c=0;
    for(i=1;i<=x;i++)
    {
        for(j=1;j<=x;j++)
        {
            a=i;
            b=j;
            r=a%b;
            while(r!=0)
            {
                a=b;
                b=r;
                r=a%b;
            }

            if(b==1) c++;
        }
    }
    g<<c;
    return 0;
}