MOD = 998244353

def solve(n):
    if n & 1:
        x = pow(26, n // 2, MOD)
        x *= 25 * (n - 1)
        return x % MOD
    else:
        x = pow(26, n // 2 - 1, MOD)
        ans = x * 26 * 25 % MOD
        ans += x * 26 * 25 * (n - 2) % MOD
        mi = pow(26, n // 2, MOD) - 26
        ans -= mi
        return ans % MOD




for _ in range(int(input())):
    print(solve(int(input())))