import java.util.Scanner;

public class Main{
  static int k, s;

  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    k = sc.nextInt();
    s = sc.nextInt();

    long count = 0;
    for(int x = 0; x <= k; x++){
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    }

    System.out.println(count);
  }
} import java.util.Scanner; Scanner java.util public class Main{
  static int k, s;

  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    k = sc.nextInt();
    s = sc.nextInt();

    long count = 0;
    for(int x = 0; x <= k; x++){
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    }

    System.out.println(count);
  }
} Main static int k k s; s public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    k = sc.nextInt();
    s = sc.nextInt();

    long count = 0;
    for(int x = 0; x <= k; x++){
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    }

    System.out.println(count);
  } main {
    Scanner sc = new Scanner(System.in);

    k = sc.nextInt();
    s = sc.nextInt();

    long count = 0;
    for(int x = 0; x <= k; x++){
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    }

    System.out.println(count);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) k = sc.nextInt() k sc.nextInt() sc.nextInt sc s = sc.nextInt() s sc.nextInt() sc.nextInt sc long count = 0; count 0 for(int x = 0; x <= k; x++){
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    } int x = 0; int x = 0; x 0 x <= k x k x++ x++ x {
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    } {
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    } if(x > s){
        continue;
      } x > s x s {
        continue;
      } continue; for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      } int y = 0; int y = 0; y 0 y <= k y k y++ y++ y {
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      } {
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      } int z = s - (x + y); z s - (x + y) s (x + y) x y if(z >= 0 && z <= k){
          ++count;
        } z >= 0 && z <= k z >= 0 z 0 z <= k z k {
          ++count;
        } ++count count System.out.println(count) System.out.println System.out System System.out count String[] args args public class Main{
  static int k, s;

  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    k = sc.nextInt();
    s = sc.nextInt();

    long count = 0;
    for(int x = 0; x <= k; x++){
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    }

    System.out.println(count);
  }
} public class Main{
  static int k, s;

  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    k = sc.nextInt();
    s = sc.nextInt();

    long count = 0;
    for(int x = 0; x <= k; x++){
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    }

    System.out.println(count);
  }
} Main
import java.util.Scanner;

public class Main{
  static int k, s;

  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    k = sc.nextInt();
    s = sc.nextInt();

    long count = 0;
    for(int x = 0; x <= k; x++){
      if(x > s){
        continue;
      }
      for(int y = 0; y <= k; y++){
        int z = s - (x + y);
        if(z >= 0 && z <= k){
          ++count;
        }
      }
    }

    System.out.println(count);
  }
}
