#include <cstdio>

inline int gcd(int a, int b) {
  return b == 0 ? a : gcd(b, a % b);
}

int main() {
  freopen("fractii.in", "r", stdin);
  freopen("fractii.out", "w", stdout);

  int n, sol = 0;
  scanf("%d", &n);
  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= n; ++j) {
      int gcd = 0;
      for (int k = 1; k <= i && k <= j; ++k)
        if (i % k == 0 && j % k == 0)
          gcd = k;
      if (gcd == 1) sol++;
    }
  printf("%d\n", sol);
}