MOD = 10 ** 9 + 7
fac = [1] * (10 ** 5 + 10)
for i in range(len(fac) - 1):
    fac[i + 1] = fac[i] * (i + 1) % MOD


def comb(n, k):
    return fac[n] * pow(fac[n - k], MOD - 2, MOD) * pow(fac[k], MOD - 2, MOD) % MOD


n = int(input())
ans = 0
for i in range(1, n + 1):
    ans += comb(n, i) * pow(i, n - i, MOD)
print(ans % MOD)