def main():
    n = int(input())

    def modpow(a, n, mod):
        res = 1
        while n > 0:
            if n & 1:
                res = res * a % mod
            a = a * a % mod
            n >>= 1
        return res

    def modinv(a, mod):
        return modpow(a, mod - 2, mod)

    def p(a):
        MOD = 10**9+7
        ret = 1
        for i in range(1, a+1):
            ret *= i
            ret %= MOD
        return ret
    print(p(2*n) * modinv(2**n, MOD) % MOD)


if __name__ == '__main__':
    main()