import java.util.Scanner;
public class Main{

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

} import java.util.Scanner; Scanner java.util public class Main{

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

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

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

} public class Main{

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

} Main
import java.util.Scanner;
public class Main{

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

}
