#chat gpt で翻訳

mod = 998244353

max_N = 2029
max_A = 202509

# dp[i][j] は mint だが Python では整数で管理し mod を都度取る
dp = [[0] * max_N for _ in range(max_N)]
yaku = [[] for _ in range(max_A)]

# ステップ0-1 数え上げ
def count_sequence():
    dp[1][0] = 1
    for i in range(2, max_N):
        for j in range(0, max_N - 2):
            if j > 0:
                dp[i][j] = (dp[i][j] + dp[i - 1][j - 1]) % mod
            dp[i][j] = (dp[i][j] + dp[i - 1][j + 1]) % mod

# ステップ0-2 約数の列挙
def count_yaku():
    for d in range(1, max_N):
        for j in range(d, max_A, d):
            yaku[j].append(d)

def solve():
    N, A = map(int, input().split())
    ans = 0
    for k in yaku[A]:
        ans = (ans + dp[N][k]) % mod
    print(ans)


count_sequence()
count_yaku()
T = int(input())
for _ in range(T):
    solve()