Hmm, now I think you might be right, and that I misunderstood the poster's original intention. The paragraph currently reads

... I'll spare the next [X] operators, and go right to (X) ("circle-X"). (X) follows the process that took us from triangle to square to pentagon, iterated an additional [X] times.

Is that an edit? I do not remember the phrase following the last comma. The notation is at least confusing, in that triangle->square->pentagon->...->circle ought to represent a limiting process, rather than a finite one.

Thank you. I would ask the op to use a less confusing notation, but I will go ahead and edit my other objections.