User blog comment:Simplicityaboveall/Insanely Fast-Growing Functions & Large Numbers - A Simple Construction/@comment-35470197-20181212123413/@comment-25912386-20181215142928

f_{t+2}(3)  =  f^3_{t+1}(1) =  f^2_{t+1}(f_{t+1}(1))  =  f^2_{t+1}(10)  = f_{t+1}(f_{t+1}(10))  =

=    the expression on page 4 of 14 with n replaced by 3

Hope you understood P進大好きbot  !