import java.util.*;
public class Main {
	public static void main(String[] atgs) {
		Scanner scan = new Scanner(System.in);
		int ans = 0;
		int K = scan.nextInt();
		int S = scan.nextInt();
		for(int x = 0; x <= K; x++){
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(0 <= z && z <= K){
					ans = ans + 1;
				}
			}
	    }
		System.out.println(ans);
		scan.close();
	}
}

/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