import java.util.*;
import java.io.*;

public class Main {
    static final int MOD = 1000000007;
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        long ans = 1;
        for (int i = 1; i <= 2 * n; i++) {
            if (i % 2 == 0) {
                ans *= i / 2;
            } else {
                ans *= i;
            }
            ans %= MOD;
        }
        System.out.println(ans);
    }
}