#include <iostream>
#include <fstream>
using namespace std;
ifstream f("1-sir.in");
ofstream g("1-sir.out");
int n,s,d[256][256][256];
void citire()
{
    f>>n>>s;
}
void rez()
{
    d[1][0][0]=1;
    int minim=-1;
    int maxim=1;
    for (int i=2;i<=n;i++)
    {
        for (int j=minim;j<=maxim;j++)
        {
            for (int k=minim;k<=maxim;k++)
            {
                d[i][j][k]=d[i-1][j-k][k+1]+d[i-1][j-k][k-1];
            }
        }
        minim=minim-i;
        maxim=maxim+i;
    }
    int suma=0;
    for (int i=minim;i<=maxim;i++)
    {
        suma=suma+d[n][s][i];
    }
    g<<suma;
}
int main()
{
    citire();
    rez();
    return 0;
}