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 X,Y = 0,Z;
		int sum = 0;
		for(Z=0;Z<=K;Z++){
			S -= Z;
			for(X=0;X<=K&&X<=S;X++){
				Y = S - X;
				if(Y>K)continue;
				sum++;
			}
			S += Z;
		}
		System.out.println(sum);
	}
}
/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