import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int K = scanner.nextInt();
        int S = scanner.nextInt();
        scanner.close();
        int combination = 0;
        int k;

        for(int i=0;i<=K;i++) {
            for(int j=0;j<=K;j++) {
                k = S-i-j;
                if(i+j+k==S && i>=0 && j>=0 && k>=0 && k <= K) {
                    combination++;
                }
            }
        }
        System.out.println(combination);
    }
}
/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