Question

One quick question?? Medal given!!
Find f(5) for this sequence:

f(1) = 2 and f(2) = 4, f(n) = f(1) + f(2) + f(n - 1), for n > 2.

f(5) = ______

Answer 1

You'll need f(4) for that.
You'll need f(3) for that.

Answer 2

What?

Answer 3

You need f(5)
f(5) = f(1) + f(2) + f(4)

You need f(4)
f(4) = f(1) + f(2) + f(3)

You need f(3)
f(3) = f(1) + f(2) + f(2)