#include <iostream>

 #include <cstdio>

 #include <memory.h>

 using namespace std;

 #define MAX 101

 #define BASE 10000

 void multiply(int a[], int len, int b) {

     for(int i=len-, carry=; i>=; i--) {

         carry += b * a[i];

         a[i] = carry % BASE;

         carry /= BASE;

     }

 }

 void divide(int a[], int len, int b) {

     for(int i=, div=; i<len; i++) {

         div = div * BASE + a[i];

         a[i] = div / b;

         div %= b;

     }

 }

 int main()

 {

     int i, j, h[][MAX];

     memset(h[], , MAX*sizeof(int));

     for(i=, h[][MAX-]=; i<=; i++) {

         memcpy(h[i], h[i-], MAX*sizeof(int));

         multiply(h[i], MAX, *i-);

         divide(h[i], MAX, i+);

     }

     while(cin >> i && i>= && i <= ) {

         for(j=; j<MAX && h[i][j]==; j++);

         printf("%d", h[i][j++]);

         for(; j<MAX; j++)

             printf("%04d", h[i][j]);

         cout << endl;

     }

     return ;

 }

 import java.io.BufferedInputStream;

 import java.math.BigInteger;

 import java.util.Scanner;

 public class Main {

     public static void main(String[] args) {

         Scanner sc = new Scanner(new BufferedInputStream(System.in));

         int n;

         while(sc.hasNext()) {

             BigInteger catalan = BigInteger.valueOf(1);

             n = sc.nextInt();

             for(int i=1; i<=n; i++) {

                 catalan = catalan.multiply(BigInteger.valueOf(4*i-2)).divide(BigInteger.valueOf(i+1));

             }

             System.out.println(catalan);

         }

         sc.close();

     }

 }