#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000000
#define Inf64 1000000000000000001LL

int main(){
	int n;
	cin>>n;
	vector dp(n+1,vector<mint>(2,0));
	dp[0][0] = 1;
	rep(i,n){
		vector ndp(n+1,vector<mint>(2,0));
		rep(j,n+1){
			rep(k,2){
				if(dp[j][k]==0)continue;
				ndp[j+1][k] += dp[j][k];
				if(j>0)ndp[j-1][k] += dp[j][k];
				if(j>0 && k==0){
					ndp[j-1][1] += dp[j][k] * (j-1);
				}
			}
		}
		swap(dp,ndp);
	}
	cout<<dp[0][1].val()<<endl;
	return 0;
}