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