n = int(input())
N = 2 * n
MOD = 10 ** 9 + 7

fact = [1] * (N + 1)
rfact = [1] * (N + 1)
r = 1
for i in range(1, N + 1):
    fact[i] = r = r * i % MOD
rfact[N] = r = pow(fact[N], -1, MOD)
for i in range(N, 0, -1):
    rfact[i - 1] = r = r * i % MOD

def comb(n, k):
    return fact[n] * rfact[k] * rfact[n - k] % MOD

ans = 1
for i in range(n):
    ans *= comb(2 * i + 2, 2)
    ans %= MOD
print(ans)