#include <stdio.h>

int main () {
  int n = 0;
  
  int res = 0;
  
  long long mod_num = 998244353LL;
  
  long long ans1 = 1LL;
  long long ans2 = 1LL;
  long long ans3 = 1LL;
  
  long long fact = 1LL;
  
  res = scanf("%d", &n);
  
  for (int i = 2; i <= n; i++) {
    long long tmp1 = ans1+fact;
    long long tmp2 = ans2+2LL*ans1+fact;
    long long tmp3 = ans3+3LL*ans2+3LL*ans1+fact;
    ans1 *= (long long) (i-1);
    ans2 *= (long long) (i-1);
    ans3 *= (long long) (i-1);
    ans1 += tmp1;
    ans2 += tmp2;
    ans3 += tmp3;
    ans1 %= mod_num;
    ans2 %= mod_num;
    ans3 %= mod_num;
  }
  
  printf("%lld\n", ans3%mod_num);
  return 0;
}