Nth Term for the series 2,4,6,9,12,16,20,25,30,36... Could you please give me an Idea to find nth Term in the series 2,4,6,9,12,16,20,25,30,36... coz im from computers background and i m not able to get the idea to find nth term for this specific series....Thank u.
Hint: $2,2,3,3,4,4,\ldots$. ${}$
This is tha N Th term ... $N=1/8(2n^2 + 4n + 1 - (-1)^n)$