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;
      for(int x=0;x<=K && x<=S;x++){
        for(int y=0;y<=K && y<=S;y++){
	          if(S-x-y>=0 && S-x-y<=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