#define _crt_secure_no_warnings

#ifndef _GLIBCXX_NO_ASSERT
#include <cassert>
#endif
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>

#ifdef __GXX_EXPERIMENTAL_CXX0X__
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#endif


#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>

#ifdef __GXX_EXPERIMENTAL_CXX0X__
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#endif

using namespace std;

int t[10] = {};


int saiki(int n, int s, bool y[10])
{
	if (n == 1)return s < 10 ? !y[s] : 0;
	if (s>t[n])return 0;
	int count2 = 0;
	for (size_t i = 0; i <= s/n; i++)
	{
		if (!y[i])
		{
			y[i] = 1;
			count2+=saiki(n - 1, s - i*n, y);
			y[i] = 0;
		}
	}
	return count2;

}

int main()
{
	int n, s;
	bool y[10];
	t[1] = 9;
	for (size_t i = 2; i < 10; i++)
	{
		t[i] = t[i - 1] * (10 - i);
	}
	while (cin >> n >> s)
	{
		for (size_t i = 0; i < 10; i++)
		{
			y[i] = 0;
		}
		cout<<saiki(n, s, y)<<endl;
	}
	return 0;
}