Ice's 2nd Salad Function

Another function created by the worst function creator. f(n) would be the nth Ackermann number (with the exception of f(1)).

$$f(x) = x \underbrace {\uparrow \uparrow  \cdots \uparrow \uparrow}_\text {x times}  x$$

$$f(1) = 1 (1 \uparrow 1)$$

$$f(2) = 4 (2 \uparrow \uparrow 2) $$

$$f(3) = $$a power tower of 7.6 trillion 3's. This number is too big to visualize.

and so on...