#include<bits/stdc++.h>
using namespace std;
using LL=long long;
using ULL=unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

const ULL M=998244353;

int N;
vector<ULL> F;

int main(){
  scanf("%d",&N);
  F.resize(N+1); F[0]=1; rep(i,N) F[i+1]=F[i]*(i+1)%M;
  ULL ans=(1+(N+1)*(M/3+1)%M)*F[N]%M*(N-1)%M*(M/2+1)%M;
  printf("%llu\n",ans);
  return 0;
}