#include <cstdio>
using namespace std;
 
bool use[10];
 
int search(int n, int s)
{
    int num = 0;
    if (n == 0){
        return (!s);
    }
	else if (n < 0){
		return (0);
	}
     
    for (int i = 0; i <= 9; i++){
        if (use[i] == false){
            use[i] = true;
            num += search(n - 1, s - i * n);
            use[i] = false;
        }
    }
     
    return (num);
}
 
int main()
{
    int n, s;
     
    while (scanf("%d %d", &n, &s) != EOF){
        for (int i = 0; i <= 9; i++){
            use[i] = false;
        }
         
        printf("%d\n", search(n, s));
    }
     
    return 0;
}