#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

#include <atcoder/modint>
using mint = atcoder::modint998244353;

int main() {
  vector<mint> dp(1001, 0);
  dp[1] = 2;
  for (int i = 2; i <= 1000; ++i) {
    dp[i] = 2;
    for (int j = 1; j < i; ++j) dp[i] += 2 * dp[j];
  }
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    cout << dp[n].val() << endl;
  }
  return 0;
}