import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int K = sc.nextInt();
        int 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 <= 3 * K && S - i - j <= K) {
                    count++;
                }
            }
        }
        System.out.println(count);
    }

} 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();
        int 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 <= 3 * K && S - i - j <= K) {
                    count++;
                }
            }
        }
        System.out.println(count);
    }

} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int K = sc.nextInt();
        int 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 <= 3 * K && S - i - j <= K) {
                    count++;
                }
            }
        }
        System.out.println(count);
    } main {
        Scanner sc = new Scanner(System.in);
        int K = sc.nextInt();
        int 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 <= 3 * K && S - i - j <= K) {
                    count++;
                }
            }
        }
        System.out.println(count);
    } 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 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 <= 3 * K && 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 <= 3 * K && S - i - j <= K) {
                    count++;
                }
            }
        } {
            for (int j = 0 ; j <= K ; j++ ) {
                if (S - i - j >= 0  && S - i - j <= 3 * K && S - i - j <= K) {
                    count++;
                }
            }
        } for (int j = 0 ; j <= K ; j++ ) {
                if (S - i - j >= 0  && S - i - j <= 3 * K && 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 <= 3 * K && S - i - j <= K) {
                    count++;
                }
            } {
                if (S - i - j >= 0  && S - i - j <= 3 * K && S - i - j <= K) {
                    count++;
                }
            } if (S - i - j >= 0  && S - i - j <= 3 * K && S - i - j <= K) {
                    count++;
                } S - i - j >= 0  && S - i - j <= 3 * K && S - i - j <= K S - i - j >= 0  && S - i - j <= 3 * K && S - i - j <= K S - i - j >= 0 S - i - j S - i - j S i j 0 S - i - j <= 3 * K S - i - j S - i - j S i j 3 * K 3 K S - i - j <= K S - i - j S - i - j S i j 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 = sc.nextInt();
        int 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 <= 3 * K && S - i - j <= K) {
                    count++;
                }
            }
        }
        System.out.println(count);
    }

} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int K = sc.nextInt();
        int 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 <= 3 * K && S - i - j <= K) {
                    count++;
                }
            }
        }
        System.out.println(count);
    }

} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int K = sc.nextInt();
        int 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 <= 3 * K && S - i - j <= K) {
                    count++;
                }
            }
        }
        System.out.println(count);
    }

}