import java.util.*;


public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        int k = sc.nextInt();
        int s = sc.nextInt();
        int ans=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) {
          			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