import java.io.File;
import java.io.IOException;
import java.util.*;
 
public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;
		
		for(int x = 0; x <= K; x++){
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			}
		}
		
		System.out.println(ans);
	}
} import java.io.File; File java.io import java.io.IOException; IOException java.io import java.util.*; util.* java public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;
		
		for(int x = 0; x <= K; x++){
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			}
		}
		
		System.out.println(ans);
	}
} Main public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;
		
		for(int x = 0; x <= K; x++){
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			}
		}
		
		System.out.println(ans);
	} main {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;
		
		for(int x = 0; x <= K; x++){
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			}
		}
		
		System.out.println(ans);
	} 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 for(int x = 0; x <= K; x++){
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			}
		} 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 && z <= K) ans++;
			}
		} {
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			}
		} for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			} 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) ans++;
			} {
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			} int z = S - x - y; z S - x - y S - x - y S x y if(z >= 0 && z <= K) ans++; z >= 0 && z <= K z >= 0 z 0 z <= K z K ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;
		
		for(int x = 0; x <= K; x++){
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			}
		}
		
		System.out.println(ans);
	}
} public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;
		
		for(int x = 0; x <= K; x++){
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			}
		}
		
		System.out.println(ans);
	}
} Main
import java.io.File;
import java.io.IOException;
import java.util.*;
 
public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;
		
		for(int x = 0; x <= K; x++){
			for(int y = 0; y <= K; y++){
				int z = S - x - y;
				if(z >= 0 && z <= K) ans++;
			}
		}
		
		System.out.println(ans);
	}
}