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