#include <bits/stdc++.h>
using namespace std;
long long n, k, dp[501][501], sm[501][501];
signed main() {
  cin.tie(0);
  cout.tie(0);
  ios_base::sync_with_stdio(false);
  cin >> n >> k;
  dp[0][0] = 1;
  for (long long i = 0; i <= n; i++) sm[0][i] = 1;
  for (long long i = 1; i <= n; i++) {
    dp[i][1] = 1;
    for (long long j = 2; j <= i; j++) {
      for (long long k = 1; k < j; k++) {
        dp[i][j] += dp[i - k][j];
        dp[i][j] %= 998244353;
      }
      dp[i][j] += sm[i - j][j];
    }
    for (long long j = 1; j <= n; j++) {
      sm[i][j] = dp[i][j] + sm[i][j - 1];
      sm[i][j] %= 998244353;
    }
  }
  long long ans = 0;
  for (long long i = 1; i <= n; i++) {
    ans += dp[n][i] * sm[n][min(n, k / i - (k % i == 0))];
    ans %= 998244353;
  }
  ans *= 2;
  ans %= 998244353;
  cout << ans;
}
