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 x = 0; x <= K; x++) {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(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;
    
    for(int x = 0; x <= K; x++) {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(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;
    
    for(int x = 0; x <= K; x++) {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(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;
    
    for(int x = 0; x <= K; x++) {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(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 for(int x = 0; x <= K; x++) {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(z <= K)
    			count++;
    	}
    } int x = 0; int x = 0; x 0 x <= K x K x++ x++ x {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(z <= K)
    			count++;
    	}
    } {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(z <= K)
    			count++;
    	}
    } for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(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)
    			break;
    		if(z <= K)
    			count++;
    	} {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(z <= K)
    			count++;
    	} int z = S - (x+y); z S - (x+y) S (x+y) x y if(z < 0)
    			break; z < 0 z 0 break; if(z <= K)
    			count++; 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;
    
    for(int x = 0; x <= K; x++) {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(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;
    
    for(int x = 0; x <= K; x++) {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(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;
    
    for(int x = 0; x <= K; x++) {
    	for(int y = 0; y <= K; y++) {
    		int z = S - (x+y);
    		if(z < 0)
    			break;
    		if(z <= K)
    			count++;
    	}
    }
    System.out.println(count);
    
  }
}