#include <bits/stdc++.h>
using namespace std;
int cal[] = {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 n;
int main() {
  cin >> n;
  long long ans = 1;
  for (int i = 0; i < cal[n - 1] - 1; i++) {
    ans *= 2;
    ans %= 1000000007;
  }
  ans = (ans + 1000000007 - 1) % 1000000007;
  cout << ans << endl;
  return 0;
}
