#include #include using ll = long long; using ull = unsigned long long; #define rep(i, n) for(int i = 0; i < (int)(n); i++) #define REP(i, m, n) for(int i = (int)(m); i < (int)(n); i++) using namespace std; using namespace atcoder; using mint = modint998244353; const int inf = 1000000007; const ll longinf = 1ll << 60; int main() { ios::sync_with_stdio(false); cin.tie(0); cout.tie(0); int t; cin >> t; while(t--) { ll n; cin >> n; ll all = n * (n - 1) / 2; mint v0 = mint(2).pow(all); mint v1 = n >= 2 ? (n - 1) * mint(2).pow(all - 1) : 0; mint v2 = n >= 3 ? (n - 1) * (mint(2).pow(all - 1) - mint(2).pow(all - 1 - 2 * (n - 2)) * (mint(3).pow(n - 2))) : 0; cout << (v0 + v1 + v2).val() << endl; } return 0; }