

import java.util.Scanner;

public class Main {

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

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

} public class Main {

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

} Main


import java.util.Scanner;

public class Main {

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

}
