#include <array>
#include <cinttypes>
#include <cstdio>
#include <unistd.h>

constexpr std::array<std::uint32_t, 14> c =
  { 1, 1, 2, 5, 14, 42, 132, 429, 1430, 4862, 16796, 58786, 208012, 742900 };

int main() {
  std::size_t n;
  scanf("%zu", &n);
  printf("%" PRIu32 "\n", c[n]);
}