#include <fstream>

using namespace std;

ifstream fin("fractii.in");
ofstream fout("fractii.out");

int n,i,j,cb,r,a,b;

int main()
{
    fin>>n;

    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)
                cb++;
        }
    fout<<cb;

    fin.close();
    fout.close();
    return 0;
}