Summation

Time Limit: 1 sec

**The Problem**

There are 4 squares is drawn. The lengths of squares are consecutive integers. Suppose if first one length is 1 then the odd consecutive series is 1, 3, 5 and 7 which are the lengths of second, third and fourth respectively and if first one length is 2 then the even consecutive series is 2, 4, 6 and 8 which are the lengths of second, third and fourth respectively.

If we make a sum of all the areas can you tell what will be result?

**The Input**

The input file contains several lines. Each line contains a single integer represents the length, **L (L<=100)** of first square. If **L** is an odd number then the series will be a consecutive odd number series and if it’s an even number then the series will be an even number series. Input is terminated by end of file (EOF)

**The Output**

For each line of input output will show the summation of squares in a separate line.

**Sample Input**

1

100

**Sample Output**

84

42456

Problem Setter: Samia Safa Ahmed