How would one read a tetration operation like $^4 3$ in spoken English?
Meaning, what's the equivalent to reading $3 \times 4$ as "three times four" or $3^4$ as "three to the power of four" for tetration with a "base" of three and an "exponent" of four?
The Wikipedia article on tetration says (without reference) that ${}^n a$ should be read as "the $n$th tetration of $a$." This is also the way it is read in the YouTube video linked to in the comments; this is not merely a case of citogenesis, as the video was made in 2014 and the Wikipedia article did not contain that line until early 2016.