n_led = int(input())
MOD7 = 1000000007
ans = 1
beki = n_led

for i in range(1, (2 * n_led) + 1):
    if i % 2 == 0 and beki != 0:
        ans = (ans * (i // 2)) % MOD7
        beki -= 1
    else:
        ans = (ans * i) % MOD7

print(ans)