#include <bits/stdc++.h>
using namespace std;
const long double PI = 3.1415926535897932384626433832795;
const long double EPS = 1e-11;
int n;
int st[40] = {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};
int main() {
  cin >> n;
  int s = 1;
  for (int i = 0; i < (st[n - 1] - 1); i++) s = (s * 2) % 1000000007;
  cout << s - 1;
  return 0;
}
