import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int k = sc.nextInt();
      int s = sc.nextInt();
      int count = 0;
      int z = 0;
      for(int i = 0;i <= k && i <= s;i++){
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= 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