import java.util.*;
 
class Main{
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    
    int k = sc.nextInt();
    int s = sc.nextInt();
    int ans = 0, sum = 0;
    for(int i=0; i<=k; i++){
      for(int j=0; j<=k; j++){
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      }
    }
    System.out.println(ans);

    sc.close();
  }
} import java.util.*; util.* java class Main{
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    
    int k = sc.nextInt();
    int s = sc.nextInt();
    int ans = 0, sum = 0;
    for(int i=0; i<=k; i++){
      for(int j=0; j<=k; j++){
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      }
    }
    System.out.println(ans);

    sc.close();
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    
    int k = sc.nextInt();
    int s = sc.nextInt();
    int ans = 0, sum = 0;
    for(int i=0; i<=k; i++){
      for(int j=0; j<=k; j++){
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      }
    }
    System.out.println(ans);

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

    sc.close();
  } 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 ans = 0 ans 0 sum = 0; sum 0 for(int i=0; i<=k; i++){
      for(int j=0; j<=k; j++){
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      }
    } int i=0; int i=0; i 0 i<=k i k i++ i++ i {
      for(int j=0; j<=k; j++){
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      }
    } {
      for(int j=0; j<=k; j++){
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      }
    } for(int j=0; j<=k; j++){
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      } int j=0; int j=0; j 0 j<=k j k j++ j++ j {
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      } {
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      } sum = s-i-j sum s-i-j s-i-j s i j if(0 <= sum && sum <= k){
          ans++;
        } 0 <= sum && sum <= k 0 <= sum 0 sum sum <= k sum k {
          ans++;
        } ans++ ans System.out.println(ans) System.out.println System.out System System.out ans sc.close() sc.close sc String[] args args
import java.util.*;
 
class Main{
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    
    int k = sc.nextInt();
    int s = sc.nextInt();
    int ans = 0, sum = 0;
    for(int i=0; i<=k; i++){
      for(int j=0; j<=k; j++){
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      }
    }
    System.out.println(ans);

    sc.close();
  }
}
