The point is that the image it draws contains the formula itself in readable text. I agree that the presentation lacks a clear exposition of the author's goal -

The point is that the image it draws contains the formula itself in readable text. I agree that the presentation lacks a clear exposition of the author's goal --- at least for people unfamiliar with the rest of his blog, I presume. I think it would be far more interesting how to actually construct this formula than just presenting the formula itself, though...