#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, 25964951};
const int mod = 1000000007;
int main() {
  int n;
  scanf("%d", &n);
  int k = p[n - 1] - 1;
  long long ans = 1, x = 2;
  while (k) {
    if (k & 1) ans = ans * x % mod;
    x = x * x % mod;
    k >>= 1;
  }
  printf("%I64d\n", (ans - 1 + mod) % mod);
  return 0;
}
