import java.util.*;
import java.math.*;

public class Main {
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        BigInteger[] a=new BigInteger[110];
        a[0]=new BigInteger("1");
        for(int i=1;i<=100;i++)
        {
            int  h=4*i-2;
            int  d=i+1;
            String b="",c="";
            int[] k=new int[10];
            int flag=0;
            while(h!=0)
            {
                k[flag++]=h%10;
                h/=10;
            }
            for(int j=flag-1;j>=0;j--){
                b+=k[j];
            }
            a[i]=a[i-1].multiply(new BigInteger(b));
            flag=0;
            while(d!=0)
            {
                k[flag++]=d%10;
                d/=10;
            }
            for(int j=flag-1;j>=0;j--){
                c+=k[j];
            }
            a[i]=a[i].divide(new BigInteger(c));
        }
        int n;
        while(cin.hasNext())
        {
            n=cin.nextInt();
            System.out.println(a[n]);
        }
    }
}