# include <iostream>
# include <fstream>
using namespace std;
int main ()
{int i2,i,n,k=0;
  fstream f("fractii.in",ios::in),
          g("fractii.out",ios::out);
    f>>n;
    for(i=1;i<=n;i++)
     for(i2=1;i2<=n;i2++)
        if(i2==1||i%i2!=0)
            k++;
        g<<k;
}