import 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();

    sc.close();

    int count = 0;

    for (int i = 0; i <= K; i++) {
      for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= 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 = sc.nextInt();
    int S = sc.nextInt();

    sc.close();

    int count = 0;

    for (int i = 0; i <= K; i++) {
      for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= 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();

    sc.close();

    int count = 0;

    for (int i = 0; i <= K; i++) {
      for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= k) {
          count++;
        }
      }
    }

    System.out.println(count);

  } main {

    Scanner sc = new Scanner(System.in);

    int K = sc.nextInt();
    int S = sc.nextInt();

    sc.close();

    int count = 0;

    for (int i = 0; i <= K; i++) {
      for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= 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 sc.close() sc.close sc int count = 0; count 0 for (int i = 0; i <= K; i++) {
      for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= 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 k = S - i - j;
        if (k <= K && 0 <= k) {
          count++;
        }
      }
    } {
      for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= k) {
          count++;
        }
      }
    } for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= k) {
          count++;
        }
      } int j = 0; int j = 0; j 0 j <= K j K j++ j++ j {
        int k = S - i - j;
        if (k <= K && 0 <= k) {
          count++;
        }
      } {
        int k = S - i - j;
        if (k <= K && 0 <= k) {
          count++;
        }
      } int k = S - i - j; k S - i - j S - i - j S i j if (k <= K && 0 <= k) {
          count++;
        } k <= K && 0 <= k k <= K k K 0 <= k 0 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();

    sc.close();

    int count = 0;

    for (int i = 0; i <= K; i++) {
      for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= 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();

    sc.close();

    int count = 0;

    for (int i = 0; i <= K; i++) {
      for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= 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 = sc.nextInt();
    int S = sc.nextInt();

    sc.close();

    int count = 0;

    for (int i = 0; i <= K; i++) {
      for (int j = 0; j <= K; j++) {
        int k = S - i - j;
        if (k <= K && 0 <= k) {
          count++;
        }
      }
    }

    System.out.println(count);

  }

}