#include <bits/stdc++.h>
using namespace std;
int d[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};
long long mypow(long long x, long long y) {
  long long res = 1;
  while (y) {
    if (y & 1) {
      res *= x;
      res %= 1000000007;
    }
    x *= x;
    x %= 1000000007;
    y >>= 1;
  }
  return res;
}
int main() {
  int i, j, k, n;
  cin >> n;
  cout << (mypow(2, d[n - 1]) - 2 + 1000000007) % 1000000007 *
              mypow(2, 1000000007 - 2) % 1000000007
       << endl;
  return 0;
}
