import java.util.*;

public class Main {
	  public static void main(String args[]){
      		Scanner scan = new Scanner(System.in);
            
            int K = scan.nextInt();
            int S = scan.nextInt();
            
            int x, y, z;
            int ans = 0;
            
            for( x = 0 ; x <= K ; x++ ){
            	for( y = 0 ; y <= K ; y++ ){
                	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