import java.util.*;

public class Main {
	public static void main(String[] args) throws Exception{
		Scanner scn = new Scanner(System.in);
		int k = scn.nextInt();
		int s = scn.nextInt();
      	int count = 0;
      	for(int x=0; x<=k; ++x){
        	for(int y=0; y<=k; ++y){
	    		if(s>=x+y && s-(x+y)<=k){
            		count = count + 1;
           		}
        	}
    	}
      	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