Originally Posted by
DoesntMatter 
Which has the closed form expression of
N(S) = 1 + 2 + 3 + …. + (S – 1) + S
LOL, this^ is what I said DM.
Okay. But isn't this just calcing the sum of a basic arthmetic sequence, tho?
I just remembered the basic formula, tho, didn't work it out from first principles.
What was the calculus method?