#include <bits/stdc++.h>
using namespace std;
const int MAX = 1000000;
const long long MOD = 998244353;
int main(){
  vector<long long> POW(MAX / 2 + 1);
  POW[0] = 1;
  for (int i = 0; i < MAX / 2; i++){
    POW[i + 1] = POW[i] * 26 % MOD;
  }
  vector<long long> dp(MAX + 1, 0);
  dp[1] = 0;
  dp[2] = 650;
  for (int i = 3; i <= MAX; i++){
    dp[i] = (dp[i - 2] * 26 + POW[i / 2] * 50) % MOD;
    if (i % 2 == 0){
      dp[i] -= 650;
      dp[i] += MOD;
      dp[i] %= MOD;
    }
  }
  int T;
  cin >> T;
  for (int i = 0; i < T; i++){
    int N;
    cin >> N;
    cout << dp[N] << endl;
  }
}