import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int K = sc.nextInt();
        int S = sc.nextInt();
        int count = 0;
        
        for(int x=0; x<=K; x++){
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            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