#include <fstream>

using namespace std;

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

int N, nrf, i, j, a, b, r;

int main()
{
    fin>>N;
    for (i=1; i<=N; i++)
    {
        for(j=1; j<=N; j++)
        {
            a=i;
            b=j;
            if (((a%2==0)and(b%2==0))or((a==b)and(a!=1))
            {
                nrf++;
            }
            else
            {
                while (b)
                {
                    r=a%b;
                    a=b;
                    b=r;
                }
                if (a==1)
                    nrf++;
            }

        }
    }
    fout<<nrf;
    fout.close();
    return 0;
}