#include <iostream>
#include <vector>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
using ll = long long;
#define REP(i, n) for(ll i=0; i<(n);i++)

int main() {
  ll n;
  cin>>n;
  vector<mint> r(n+2),e(n+2);
  r[0]=e[0]=r[1]=1;
  e[1]=3;
  REP(i,n){
  	r[i+2]=r[i+1]+r[i];
  	e[i+2]=e[i+1]+e[i];
  }
  cout<<(r[n-1]*r[n-1]*5-e[n-1]*e[n-1]).val()<<endl;

  return 0;
}