import sys
input = lambda : sys.stdin.readline().strip()
ni = lambda : int(input())
na = lambda : list(map(int, input().split()))
yes = lambda : print("yes"); Yes = lambda : print("Yes"); YES = lambda : print("YES")
no = lambda : print("no"); No = lambda : print("No"); NO = lambda : print("NO")

mod = 998244353
nn = 3 * 10 ** 6 + 100
fact = [1] * nn
for i in range(nn - 1):
    fact[i + 1] = fact[i] * (i + 1) % mod
invfact = [1] * nn
invfact[nn - 1] = pow(fact[nn - 1], mod - 2, mod)
for i in range(nn - 1)[::-1]:
    invfact[i] = invfact[i + 1] * (i + 1) % mod
 
def binom(x, y):
    if x < 0 or y < 0 or x - y < 0:
        return 0
    return fact[x] * invfact[y] % mod * invfact[x - y] % mod


for _ in range(ni()):
    n = ni()
    if n % 2 == 0:
        n //= 2
        n -= 1
        print((pow(4, n, mod) - binom(2 * n + 1, n)) % mod)
    else:
        print(0)