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;
      int z = 0;
      for(int i = 0;i <= k && i <= s;i++){
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= 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;
      int z = 0;
      for(int i = 0;i <= k && i <= s;i++){
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= 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;
      int z = 0;
      for(int i = 0;i <= k && i <= s;i++){
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= k)count++;
        }
      }
      System.out.println(count);
    } main {
    	Scanner sc = new Scanner(System.in);
      int k = sc.nextInt();
      int s = sc.nextInt();
      int count = 0;
      int z = 0;
      for(int i = 0;i <= k && i <= s;i++){
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= 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 int z = 0; z 0 for(int i = 0;i <= k && i <= s;i++){
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= k)count++;
        }
      } int i = 0; int i = 0; i 0 i <= k && i <= s i <= k i k i <= s i s i++ i++ i {
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= k)count++;
        }
      } {
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= k)count++;
        }
      } for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= k)count++;
        } int j = 0; int j = 0; j 0 j <= k && j <= s-i j <= k j k j <= s-i j s-i s i j++ j++ j {
        	z = s-i-j;
          if(z >= 0&&z <= k)count++;
        } {
        	z = s-i-j;
          if(z >= 0&&z <= k)count++;
        } z = s-i-j z s-i-j s-i-j s i j if(z >= 0&&z <= k)count++; z >= 0&&z <= k z >= 0 z 0 z <= k z 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;
      int z = 0;
      for(int i = 0;i <= k && i <= s;i++){
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= 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;
      int z = 0;
      for(int i = 0;i <= k && i <= s;i++){
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= 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;
      int z = 0;
      for(int i = 0;i <= k && i <= s;i++){
      	for(int j = 0;j <= k && j <= s-i;j++){
        	z = s-i-j;
          if(z >= 0&&z <= k)count++;
        }
      }
      System.out.println(count);
    }
}
