#include <fstream>
using namespace std;
int main()
{
    ifstream f("fractii.in");
    ofstream g("fractii.out");
    unsigned long long int n, i, j, nr=0, a, b;
    f>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++) {
            a=i;
            b=j;
            if(a>1||b>1)
            while(a!=b) {
                if(a>b)
                    a-=b;
                else
                    b-=a;
            }
            if(a==1)
                nr++;
        }
    g<<nr;
}