MOD = 998244353 # read input N = int(input()) # calculate fact = 1 for i in range(1, N + 1): fact = fact * i % MOD for i in range(1, N + 1): E = (N + 1) * pow(i + 1, MOD - 2, MOD) % MOD # = (N + 1) / (i + 1) print(E * (N - i + 1) * i * fact % MOD)