import java.util.Arrays;
import java.util.Scanner;

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

	final long MOD = (long) 1e9 + 7;
	long[] fac = new long[2000001];
	long[] ifac = new long[2000001];
	long[] inv = new long[2000001];
	{
		fac[0] = ifac[0] = fac[1] = ifac[1] = 1;
		for (int i = 2; i < fac.length; ++i)
			fac[i] = i * fac[i - 1] % MOD;
		inv[0] = inv[1] = 1;
		for (int i = 2; i < inv.length; ++i) {
			inv[i] = MOD - inv[(int) (MOD % i)] * (MOD / i) % MOD;
			ifac[i] = ifac[i - 1] * inv[i] % MOD;
		}
	}

	void run() {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		long ans = 1;
		for (int i = 0; i < N; ++i) {
			ans = ans * fac[2 * i + 2] % MOD * ifac[2 * i] % MOD * ifac[2] % MOD;
		}
		ans = ans * fac[N] % MOD;
		System.out.println(ans);
	}

	long inv(long a) {
		return pow(a, MOD - 2);
	}

	long pow(long a, long n) {
		long ret = 1;
		for (; n > 0; n >>= 1, a = a * a % MOD) {
			if (n % 2 == 1)
				ret = ret * a % MOD;
		}
		return ret;
	}

	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}