public class Main {
	public static void main(String[] args) {
		java.util.Scanner s = new java.util.Scanner(System.in);

		System.out.println((Main.calc(s.nextInt(), s.nextInt())));
	}

	public static int calc(int k, int s) {
		int count = 0;
		for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k; y++) {
				int z = s - x - y;
				if (0 <= z && z <= k) {
					count++;
				}
			}
		}
		return 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