#include <iostream>
#include <fstream>
#include <utility>
#include <set>

using namespace std;


ifstream f("fractii.in");
ofstream g("fractii.out");

std::set<std::pair<int,int> > Set;


int gcd(int a, int b) {
  int t;
  if(b>a){
    t=a;
    a=b;
    b=t;
  }
  while (b != 0) {
    t = b;
    b = a % b;
    a = t;
  }
  return a;
}

int main()
{
    int n;
    f>>n;
    for(int i=1;i<=n;i++)
        for(int j=1;j<=n;j++)
        {
            int tmp=gcd(i,j);
            Set.insert(make_pair(i/tmp,j/tmp));
        }
    g<<Set.size();
    return 0;
}