#include <bits/stdc++.h>
int ps[] = {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};
const int MO = 1000000007;
int pow(int x, int e) {
  int v = 1;
  for (; e; e >>= 1, x = (long long)x * x % MO)
    if (e & 1) v = (long long)v * x % MO;
  return v;
}
int main() {
  int n;
  scanf("%d", &n);
  printf("%d\n", (pow(2, ps[n - 1] - 1) - 1 + MO) % MO);
  return 0;
}
