package yukicoder;

import java.util.Scanner;

public class No554 {
    private int n;
    private int[] a;
    private int sumtmp;

    public static void main(String[] args) {
        No554 main = new No554();
        main.run();
    }

    private void run() {
        Scanner sc = new Scanner(System.in);
        n = sc.nextInt();
        a = new int[n + 1];

        a[1] = 1;
        for(int i = 2; i < a.length; i++) {
            if(i % 2 == 1) {
                a[i] = odd(i);
            } else {
                a[i] = even(i);
            }
        }
        System.out.println(a[n]);
    }

    private int odd(int n) {
        sumtmp = 0;
        for(int i = 2; i < n; i += 2) {
            sumtmp += a[i];
        }
        return n * sumtmp;
    }

    private int even(int n) {
        sumtmp = 0;
        for(int i = 1; i < n; i += 2) {
            sumtmp += a[i];
        }
        return n * sumtmp;
    }
}