import java.util.Scanner;

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

        int K = sc.nextInt();
        int S = sc.nextInt();

        sc.close();

        
        int ans = 0;
        
        for(int X = 0; X <= K; X++) {
            for (int Y = 0; Y <= K; Y++) {
                int Z = 0;
                Z = S - X - Y;
                if(Z >= 0 && Z <= K) {
                    ans++;
                }
                
            }
        } 
        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