T = int(input())
query = [int(input()) for _ in range(T)]

def inverse(n, d):
    return n * pow(d, MOD-2, MOD) % MOD

MOD = 998244353
for i in range(T):
    N = query[i]
    E = (1+((1-inverse(1, 2)*pow(inverse(3, 4), N-2, MOD)%MOD)%MOD)*(N-1)%MOD)%MOD
    print(E*pow(2, N*(N-1)//2, MOD)%MOD)