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 i = 0; i <= K; i++){
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= 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