import java.util.Scanner;

public class Main {
	
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        int K = sc.nextInt();
        int S = sc.nextInt();
        
        int ans = 0;
        for (int x = 0; x <= K; x++) {
        	for (int y = 0; y <= K; y++) {
        		if (x+y > S)
        			break;
        		
        		if (S - (x + y) <= 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