#include<bits/stdc++.h>
#define CSP2026 using
#define RP namespace
#define PLUSPLUS std
CSP2026 RP PLUSPLUS;
#define debug(x) cout<<"clock="<<clock()<<' '<<#x<<'='<<(x)<<'\n'
//#define getchar getchar_unlocked
using ll=long long;
inline int rd(){int x=0,f=1;char ch=getchar();for(;!isdigit(ch);ch=getchar())if(ch=='-')f=-1;for(;isdigit(ch);ch=getchar())x=(x<<3)+(x<<1)+(ch^48);return x*f;}
inline ll rdll(){ll x=0;int f=1;char ch=getchar();for(;!isdigit(ch);ch=getchar())if(ch=='-')f=-1;for(;isdigit(ch);ch=getchar())x=(x<<3)+(x<<1)+(ch^48);return x*f;}
constexpr int N=1005,P=998244353;
int C[N][N],fac[N];
inline int getC(int n,int m){
	if(m<0||m>n)return 0;
	else return C[n][m];
}signed main(){
	int n=rd(),ans=0;
	fac[0]=1;
	for(int i=1;i<=n;++i)fac[i]=1ll*fac[i-1]*i%P;
	for(int i=0;i<=n;++i)for(int j=0;j<=i;++j){
		if(j==0)C[i][j]=1;
		else C[i][j]=(C[i-1][j]+C[i-1][j-1])%P;
	}for(int i=1;i<=n;++i){
		int cnt=getC(i-1,n-2-i+1-i);
		if(cnt)ans=(ans+1ll*fac[i]*cnt%P*fac[n-i])%P;
	}for(int i=1;i<=n;++i){
		int cnt=2ll*getC(i-1,n-1-i+1-i);
		if(cnt)ans=(ans+1ll*fac[i]*cnt%P*fac[n-i])%P;
	}for(int i=1;i<=n;++i){
		int cnt=getC(i-1,n-i+1-i);
		if(cnt)ans=(ans+1ll*fac[i]*cnt%P*fac[n-i])%P;
	}cout<<ans<<'\n';
}