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