import java.util.*;

public class Main {
    static final int MOD = 1000000007;
	public static void main (String[] args) {
    	Scanner sc = new Scanner(System.in);
    	int n = sc.nextInt();
    	long ans = 1;
    	for (int i = 1; i <= n * 2; i++) {
    	    if (i % 2 == 0) {
    	        ans *= i / 2;
    	    } else {
    	        ans *= i;
    	    }
    	    ans %= MOD;
    	}
    	System.out.println(ans);
    }
}