import java.util.Scanner;
public class Main{
    private static Scanner sc=new Scanner(System.in);
    public static void main(String[] args){
        int k=sc.nextInt();
        int s=sc.nextInt();
        int ans=0;
        for(int x=0;x<=k;x++){
            for(int y=0;y<=Math.min(k,s-x);y++){
                int z=s-x-y;
                if(z>=0&&z<=k) ans++;
            }
        }
        System.out.println(ans);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz