Question

series: 1,2,5,10,17..., sum of first 50 terms?

Answer 1

may be this is what you are looking for

http://www.wolframalpha.com/input/?i=sum+j%5E2-2j%2B2%2C+j%3D1+to+50

Answer 2

hmm, i too have a solution for this problem but the fact is i couldn't understand much of it. that i why i posted this here hoping to find a concise solution

Answer 3

you can get the partial sum up to n here
sure it should be quite easy after you get the general term

http://www.wolframalpha.com/input/?i=sum+j%5E2-2j%2B2

Answer 4

i found the solution that i have with me more comprehendable than this, but thanks a lot :)