N = int(input()) class combination(): def __init__(self,N,p):#Nは上限,pはmod self.fact = [1,1] self.factinv = [1,1] self.inv = [0,1] for i in range(2, N + 1): self.fact.append((self.fact[-1] * i) % p) self.inv.append((-self.inv[p % i] * (p // i)) % p) self.factinv.append((self.factinv[-1] * self.inv[-1]) % p) def cmb(self,n, r,p): if (r < 0) or (n < r): return 0 r = min(r, n - r) return self.fact[n] * self.factinv[r] * self.factinv[n-r] % p mod = 998244353 C = combination(10**6,mod) for k in range(1,N+1): ans = (k * C.fact[k] * C.fact[N-k+1])% mod * C.cmb(N+1,k+1,mod) ans %= mod print(ans)