I've done some research, and found this on Wikipedia.
a↑b=ab=a×a×⋯×a⏟b copies of a
a↑↑b= ba=aa...a⏟=a↑(a↑(⋯↑a))⏟b copies of ab copies of a
I'm still a bit confused on this topic. I've done a lot of research, but I can't seem to understand this. Could somebody explain this in an understandable way? From what I can gather, for example 2↑↑3 would be 2^2^2 = 16? Then 2↑↑↑3 would be 2^2^2^2 = 256? Am I correct, or have I mis-interpreted this?