#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>

const uint32_t c[] =
  { 1, 1, 2, 5, 14, 42, 132, 429, 1430, 4862, 16796, 58786, 208012, 742900 };

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