Catalan Numbers

/* In combinatorics, the Catalan numbers are calculated by the following formula:
 * C = (2n)! / ((n + 1)! * n!)
 * Write a program to calculate the nth Catalan number by given n (1 < n < 100). */

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Scanner;

public class CatalanNums {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a whole positive number in the range [2 .. 99] for N: ");
        int numN = scanner.nextInt();
        scanner.close();

        if (numN > 1 && numN < 100) {
            BigDecimal catalanNumber = BigDecimal.ONE;
            for (int i = numN; i > 1; i--) {
                    BigDecimal quotient = new BigDecimal("" + (i + numN));
                    quotient = quotient.divide(new BigDecimal("" + i), 50, BigDecimal.ROUND_HALF_UP);
                    catalanNumber = catalanNumber.multiply(quotient);
            }

            BigInteger result = catalanNumber.setScale(0, BigDecimal.ROUND_HALF_UP).toBigInteger();
            System.out.printf("The %d-th Catalan number is equal to: %s !\n",
                            numN, result);
    } else {
            System.out.println("Error! - Invalid Input number!!!");
        }
    }

}