#include <bits/stdc++.h>
using namespace std;
const int maxn = 1 << 17;
const int mod = 1000000007;
const int inf = 1 << 30;
#pragma comment(linker, "/STACK:16000000")
int a[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 n;
int main() {
  cin >> n;
  long long ans = 1;
  for (int i = 1; i < a[n - 1]; i++) {
    ans *= 2;
    if (ans >= mod) ans -= mod;
  }
  ans = (ans - 1 + mod) % mod;
  cout << ans << endl;
  return 0;
}
