import java.io.*;
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

//    String nyuA=sc.nextLine();
 
      String[] t=sc.nextLine().split(" ");

//int n=Integer.parseInt(nyu);

int K=Integer.parseInt(t[0]);
int S=Integer.parseInt(t[1]);


//long H=Long.parseLong(t[0]);
//long W=Long.parseLong(t[1]);
//long C=Long.parseLong(t[2]);

//boolean[][] data=new boolean[H][W];

int count=0;
br:
for(int i=0;i<=K;i++){
for(int j=0;j<=K;j++){
int k=S-i-j;
if(0<=k && k<=K){
count++;
}
}
}


System.out.println(count);

	}
}
/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