#include<bits/stdc++.h>
using namespace std;
#define rep_(i, a_, b_, a, b, ...) for (int i = (a), lim##i = (b); i < lim##i; ++i)
#define rep(i, ...) rep_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
using ll = long long;

int main() {
  ll n, k; cin >> n >> k;
  unordered_map<ll, ll> dp;
  dp[k] = 1;
  for (; n; --n)
    for (auto [x, y] : unordered_map<ll, ll>(dp))
      if (x >= n) dp[x/n] += y;
  ll ans = -1;
  for (auto [x, y] : dp) if (x) ans += y;
  cout << ans << '\n';
}