User blog comment:Cheetahrock63/Hyper operator notations/@comment-39162-20171104015715

$$a \uparrow \uparrow b = E_{n=1}^{b} a$$

So you can write Bentley's number out as

$$1 + \Sigma_{i=1}^{9} E_{j=1}{i} 10$$

Is this better than what the wiki already has for it? Maybe.