T = int(input())
MOD = 998244353

for _ in range(T):
    N = int(input())
    dp = [[0] * (N + 1) for i in range(N + 1)]
    dp[0][0] = 1
    for i in range(N):
        for j in range(N):
            dp[i + 1][j + 1] = (dp[i][j + 1] + 2 * dp[i][j]) % MOD
    ans = 0
    for a in dp[-1]:
        ans = (ans + a) % MOD
    print(ans)