import java.util.Scanner;

public class Main {

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

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

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

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

public class Main {

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