import java.util.*;
class Main
{
  public static void main(String[] args)
  {
    Scanner sc = new Scanner(System.in);
    int k = sc.nextInt();
    int s = sc.nextInt();
    
    //0<=x,y,z<=k
	int sum = 0;
    for(int x=0 ; x<=k ; x++){
      for(int y=0 ; y<=k ; y++){
        int z = s-(x+y);
          if( (0<=z) && (z<=k) ){
            sum++;
          
        }
      }
    }
    System.out.println(sum);
  }
}
/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