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