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Calculate the formula

Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 12944    Accepted Submission(s): 3994


Problem Description
You just need to calculate the sum of the formula: 1^2+3^2+5^2+¡­¡­+ n ^2.
 

Input
In each case, there is an odd positive integer n.
 

Output
Print the sum. Make sure the sum will not exceed 2^31-1
 

Sample Input
3
 

Sample Output
10
 

Author
wangye
 

Source
HDU 2007-11 Programming Contest_WarmUp
 

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