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Find 1^2/1 + (1^2 + 2^2) / 2 + (1^2 + 2^...

Find `1^2/1 + (1^2 + 2^2) / 2 + (1^2 + 2^2 + 3^2) / 3` + …..upto n terms.

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The correct Answer is:
`(2n( n +1) (2 n +1) )/(6) + ( 3n (n+1))/( 2) +n`
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