#include <bits/stdc++.h>
using namespace std;
long long md(long long a, long long b) {
  long long ret = 1;
  a %= 1000000007;
  while (b) {
    if (b & 1) {
      ret = (ret * a) % 1000000007;
    }
    a = (a * a) % 1000000007;
    b >>= 1;
  }
  return ret;
}
int mp[41] = {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;
  scanf("%d", &n);
  printf("%d\n", md(2, mp[n - 1] - 1) - 1);
  return 0;
}
