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 i = 0; i <= K; i++){
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        }
      	System.out.println(count);
    }
} import java.util.*; util.* java 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 i = 0; i <= K; i++){
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        }
      	System.out.println(count);
    }
} 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 i = 0; i <= K; i++){
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        }
      	System.out.println(count);
    } main {
    	Scanner sc = new Scanner(System.in);
      	int K = sc.nextInt();
      	int S = sc.nextInt();
      	int count = 0;
      	for(int i = 0; i <= K; i++){
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        }
      	System.out.println(count);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int K = sc.nextInt(); K sc.nextInt() sc.nextInt sc int S = sc.nextInt(); S sc.nextInt() sc.nextInt sc int count = 0; count 0 for(int i = 0; i <= K; i++){
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        } int i = 0; int i = 0; i 0 i <= K i K i++ i++ i {
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        } {
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        } for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            } int j = 0; int j = 0; j 0 j <= K j K j++ j++ j {
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            } {
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            } int k = S - i - j; k S - i - j S - i - j S i j if(k >= 0 && k <= K) count++; k >= 0 && k <= K k >= 0 k 0 k <= K k K count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args 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 i = 0; i <= K; i++){
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        }
      	System.out.println(count);
    }
} 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 i = 0; i <= K; i++){
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        }
      	System.out.println(count);
    }
} Main
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 i = 0; i <= K; i++){
        	for(int j = 0; j <= K; j++){
            	int k = S - i - j;
              	if(k >= 0 && k <= K) count++;
            }
        }
      	System.out.println(count);
    }
}