#include <bits/stdc++.h>
using namespace std;
int mars[] = {2,       3,       5,       7,        13,       17,      19,
              31,      61,      89,      107,      127,      521,     607,
              1279,    2203,    2281,    3217,     4253,     4423,    9689,
              9941,    11213,   19937,   21701,    23209,    44497,   86243,
              110503,  132049,  216091,  756839,   859433,   1257787, 1398269,
              2976221, 3021377, 6972593, 13466917, 20996011, 24036583};
int main() {
  int n;
  cin >> n;
  long long soln = 1;
  for (int i = 1; i < mars[n - 1]; i++) {
    soln = (soln * 2) % 1000000007LL;
  }
  soln = (soln + 1000000007LL - 1) % 1000000007LL;
  cout << soln << endl;
  return 0;
}
