In Java

A pentagonal number is defined as n(3n1)/2n(3n1)/2 for n=1, 2,n=1, 2, , and so on. Therefore, the first few numbers are 1, 5, 12, 22, ... .

Write a method with the following header that returns a pentagonal number:

public static int getPentagonalNumber(int n)

For example, getPentagonalNumber(1) returns 1 and getPentagonal Number(2) returns 5. Write a test program that uses this method to display the first 100 pentagonal numbers with 10 numbers on each line.