#include <bits/stdc++.h>
#pragma warning(disable : 4996)
using namespace std;
int n, m;
int p[44] = {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 qp(long long a, long long b) {
  long long re = 1;
  while (b) {
    if (b & 1) re = re * a % 1000000007;
    b >>= 1;
    a = a * a % 1000000007;
  }
  return re;
}
int main() {
  int t, x, y, z, ca = 1;
  scanf("%d", &(n));
  long long re = qp(2, p[n - 1] - 1) - 1;
  if (re < 0) re += 1000000007;
  printf("%d\n", ((int)re));
  return 0;
}
