import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        String[] inputs = input.readLine().split(" ");
        int K = Integer.parseInt(inputs[0]);
        int S = Integer.parseInt(inputs[1]);

        int[] xPlusY = new int[2 * K + 1];
        for (int x = 0; x <= K; x++) {
            for (int y = 0; y <= K; y++) {
                xPlusY[x + y] += 1;
            }
        }

        int count = 0;
        for (int z = 0; z <= K; z++) {
            int sMinusZ = S - z;
            
            if (sMinusZ <= 2 * K && sMinusZ >= 0) {
                count += xPlusY[sMinusZ];
            }

        }

        System.out.println(count);
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz