import java.util.Scanner;
 
class Main {
	int k;
	int s;
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		Main m = new Main(sc);
		m.solve();
		sc.close();
	}
	Main(Scanner sc){
		k = sc.nextInt();
		s = sc.nextInt();
	}
	void solve(){
		int ans = 0;
		for(int x=0;x<=k;x++){
			for(int y=0;y<=k;y++){
				if((s-(x+y)<=k)&&(s-(x+y)>=0)) 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