#include <bits/stdc++.h>
using namespace std;
int n, i;
int tab[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};
int pow(int n) {
  long long res = 1, p = 2;
  while (n) {
    if (n % 2 == 1) res *= p;
    res %= 1000000007;
    p *= p;
    p %= 1000000007;
    n /= 2;
  }
  res += (1000000007 - 1);
  res %= 1000000007;
  return res;
}
int main() {
  scanf("%d", &n);
  --n;
  printf("%d\n", pow(tab[n] - 1));
  return 0;
}
