User blog comment:Nedherman1/Is it possible something like omega^...(n)...^omega?/@comment-27516045-20191214190657

I'm assuming he means w^^...^^w. Yeah, it's meaning is unclear. We even have a whole channel in the Discord dedicated to arguing over the meaning of ordinal hyper-operators, thanks to certain people who wouldn't drop the subject, leading to it having to be contained instead.

Personally, i'd tell you that w^^...^^w (with n arrows, 2 <= n < w) = phi(n-1,0). But that's just using one possible way to define it.