#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using mint=modint998244353; //1000000007;
using ll=long long;
using pp=pair<int,int>;
#define sr string 
#define vc vector
#define fi first
#define se second
#define rep(i,n) for(int i=0;i<(int)n;i++)
#define pb push_back
#define all(v) v.begin(),v.end()
#define pque priority_queue
#define bpc(a) __builtin_popcount(a)
int main(){
  int t;cin>>t;
  rep(z,t){
    int n;cin>>n;
    ll m=(ll)n*(n-1)/2;
    mint p=mint(2).pow(m);
    mint ans=p;
    ans+=p/2*(n-1);
    if(n>1){
      mint d=1-mint(3).pow(n-2)/mint(4).pow(n-2);
      ans+=p/2*(n-1)*d;
    }
    cout<<ans.val()<<"\n";
  }
}