#include <iostream>
#include <fstream>

using namespace std;

ifstream f("fractii.in");
ofstream g("fractii.out");
int n, i, j, t, d, nrf=0;
int main()
{

    f >> n;
    for (i = 1; i <= n; i++)
        for (j = 1; j <= n; j++)
        {
            d = 0;
            for (t = 1; t <= max(i,j); t++)
            {
                if( i % t == 0 && j % t==0)
                    d++;
            }
            if (d == 1)
                nrf++;

        }
    g << nrf;

}