How many squares are there on chess board?

Ok in the post of  'how many squares' you solved the question. Because of its reputation and my interest about chess and math ( math is little bit related with programming too ) i want to show you a tricky question. In a chess board there are 8x8=64 squares but actually there are more squares hidden on chess board. And the real answer is in fact 204.






Formula for calculating it is like this.
n x (n + 1) x (2n + 1)
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6

You can check it here