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 ret = 0;
			
			for(int i=0;i<=k;i++) {
				for(int j=0;j<=k;j++) {
					if(0<=(s-i-j)&&(s-i-j)<=k) {
						ret++;
					}
				}
			}
			
			System.out.println(ret);
			
	    }
		
	}
	 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 ret = 0;
			
			for(int i=0;i<=k;i++) {
				for(int j=0;j<=k;j++) {
					if(0<=(s-i-j)&&(s-i-j)<=k) {
						ret++;
					}
				}
			}
			
			System.out.println(ret);
			
	    }
		
	} Main public static void main(String[] args) {

			Scanner sc = new Scanner(System.in);
			
			int k = sc.nextInt();
			int s = sc.nextInt();
			
			int ret = 0;
			
			for(int i=0;i<=k;i++) {
				for(int j=0;j<=k;j++) {
					if(0<=(s-i-j)&&(s-i-j)<=k) {
						ret++;
					}
				}
			}
			
			System.out.println(ret);
			
	    } main {

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

			Scanner sc = new Scanner(System.in);
			
			int k = sc.nextInt();
			int s = sc.nextInt();
			
			int ret = 0;
			
			for(int i=0;i<=k;i++) {
				for(int j=0;j<=k;j++) {
					if(0<=(s-i-j)&&(s-i-j)<=k) {
						ret++;
					}
				}
			}
			
			System.out.println(ret);
			
	    }
		
	} 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 ret = 0;
			
			for(int i=0;i<=k;i++) {
				for(int j=0;j<=k;j++) {
					if(0<=(s-i-j)&&(s-i-j)<=k) {
						ret++;
					}
				}
			}
			
			System.out.println(ret);
			
	    }
		
	}
	
