#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ar array
#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename \
  enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifdef LOCAL
~debug() { cerr << endl; }
eni(!=) cerr << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
  ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
  *this << "[";
  for (auto it = d.b; it != d.e; ++it)
    *this << ", " + 2 * (it == d.b) << *it;
  ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "

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

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
   // p - numarator 
   // q - numitor
   
   int n;
   fin >> n;
   bool found = true;
   int ans = 0;
   for(int numarator = 1; numarator <= n; ++numarator) {
	   for(int numitor = 1; numitor <= n; ++numitor) {
		   found = true; 
		   for(int i = 2; i <= numitor; ++i) {
			   if(numarator % i == 0 && numitor % i == 0) {
				   found = false;
				   break;
			   }
		   }		   		   
		   if(found) {
			   ans++;
		   }
	   }
   }
	
	fout << ans;
	
	return 0;
}