import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int k = Integer.parseInt(sc.next());
		int s = Integer.parseInt(sc.next());
		int count = 0;
      	for(int i = 0; i <= k; i++){
          	for(int j = 0; j <= k; j++){
          		int z = s-i-j;
          		if(z >=0 && z<=k) {
          			count++;
          		}
          	}
      	}
      			System.out.println(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