#include <bits/stdc++.h>
using namespace std;
int MOD = (int)1e9 + 7;
int pw[50] = {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;
  int ret = 1;
  for (int i = (1); i <= (pw[n - 1] - 1); i++) (ret <<= 1) %= MOD;
  cout << ret - 1 << endl;
  return 0;
}
