#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic pop
using namespace std;
using namespace atcoder;
#define rep(i,n)for (int i = 0; i < int(n); ++i)
#define rrep(i,n)for (int i = int(n)-1; i >= 0; --i)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
template<class T> void chmax(T& a, const T& b) { a = max(a, b); }
template<class T> void chmin(T& a, const T& b) { a = min(a, b); }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using mint = modint998244353;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  // (a-1)S = (a^n-a^2)/(a-1)-(n-1)
  // 26^n*n-S
  int tt;
  cin >> tt;
  while(tt--) {
    int n;
    cin >> n;
    mint a = 26;
    mint ans;
    if (n % 2) {
      n /= 2;
      ans = n * a.pow(n) * (a - 1) * 2;
    } else {
      n /= 2;
      ans = n * a.pow(n) * (a - 1) * 2 - a * (a - 1) * (a.pow(n) - 1) / (a - 1);
    }
    cout << ans.val() << '\n';
  }
}