#include <bits/stdc++.h>
using namespace std;

struct iofast_t {
    iofast_t() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} iofast;

struct uns_t {} uns;
template <typename Element, typename Head, typename ...Args>
auto vec(Element init, Head arg, Args ...args) {
    if constexpr (sizeof...(Args) == 0) return std::vector(arg, init);
    else return std::vector(arg, vec(init, args...));
}
template <typename Element, typename Head, typename ...Args>
auto vec(uns_t, Head arg, Args ...args) {
    return vec(Element(), arg, args...);
}

template <typename T, typename Compare = less<T>>
T &chmin(T &l, T r, Compare &&f = less<T>()) { return l = min(l, r, f); }
template <typename T, typename Compare = less<T>>
T &chmax(T &l, T r, Compare &&f = less<T>()) { return l = max(l, r, f); }

int main() {
    int64_t n, k; cin >> n >> k;

    auto update = vec<int64_t>(uns, n + 1, 0);

    update[n].push_back(k);
    for (int i = n; 0 < i; --i) {
        auto s = vec<int64_t>(uns, 0);
        for (auto v : update[i]) {
            s.push_back(v);
            s.push_back(v / i);
        }

        sort(begin(s), end(s));
        s.erase(unique(begin(s), end(s)), end(s));

        for (auto v : s) {
            update[i - 1].push_back(v);
        }
    }

    unordered_map<int64_t, int64_t> dp1;
    for (auto v : update[0]) {
        dp1[v] = 0 < v;
    }

    for (int i = 1; i <= n; ++i) {
        unordered_map<int64_t, int64_t> dp2;
        for (auto v : update[i]) {
            dp2[v] = dp1[v] + dp1[v / i];
        }
        swap(dp1, dp2);
    }

    cout << dp1[k] - 1 << endl;
}