#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int main()
{   int n,j,i,p,t,k,r;
    f>>n;
    p=0;
    t=0;
    for (j=1;j<=n;j++)
    {
        for (i=1;i<=n;i++)
        {
            p++;
            r=0;
            for(k=2;k<=i;k++)
            {
                if (i%k==0&&j%k==0&&r==0)
                {
                    t++;
                    r++;
                    break;
                }
            }
        }
    }
   g<<p-t;;
}