Aeon418
Or the process of squaring the circle. It is also significant that this process is spread over 30 Aethyrs. 30 = Lamed.I think an interesting comparison is to be made with the unfolding of the Cube which leads us to the Rosy cross that's at the back of the Thoth deck's Trumps.
You might find Crowley's reinterpretation of IAO interesting.That also got me thinking that The Devil and The Fool along with the thunderbolt/swastiga is pretty informing indeed, because I think those two cards reveal both aspects of Heru-Ra-Ha, Harpocrates (Atu 0) and Ra-Hoor-Khuit (Atu XV).
http://hermetic.com/crowley/book-4/chap5.html
Under the number 11 in Speher Sephiroth there is the word, ChBA. This means hidden or concealed. That brings to mind a certain title of Kether. The Concealed of the Concealed.Also, The Fool is the 11th Path and The Devil is the 26th Path adding to 37, GOD, To grow great, Flame, Behold!.
26 is of course the value of IHVH. But it is also the combined value of the sephiroth on the middle pillar. This suggests extension and manifestation.