// "static void main" must be defined in a public class.
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int K = scan.nextInt();
        int S = scan.nextInt();
        int ans = 0;
        for(int i = 0; i <= K; i++){
            for(int j = 0; j <= K; j++){
                if(S-i-j <= K && S-i-j >= 0){
                    ans++;
                }else if(S-i-j <= 0){break;}
            }
        }
        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