User blog comment:Tetramur/Pentational arrays and beyond - comparisons/@comment-37993808-20191211162933/@comment-37993808-20191212120542

Which order? Ordinary TM = TM of order 1 TM with oracle to compute BB = TM of order 2 TM with oracle to compute BB2 for order 2 = TM of order 3 and so on.