#include<bits/stdc++.h>
using namespace std;

constexpr int ans[14] = {0, 1, 2, 5, 14, 42, 132, 429, 1430, 4862, 16796, 58786, 208012, 742900};

int main(){
    size_t N;
    scanf("%lu", &N);
    printf("%d", ans[N]);
    return 0;
}