#include <fstream>
using namespace std;
int n,a,b,j,i,nr;
int main()
{
    ifstream f ("fractii.in");
    ofstream g ("fractii.out");
    f>>n;
    for (i=1;i<=n;i++)
    {
        for (j=1;j<=n;j++)
        {
            a=i;
            b=j;
            while (a>0 && b>0)
            {
                if(a>b)
                    a=a-b;
                else b=b-a;
            }
            if (a<2 && b<2)
                nr++;
        }
    }
    g<<nr;
    return 0;
}