I don't see how Pennyology proves your point: a pennyologist discovers that there's an O on the front and an O on the back. Perhaps he invents meaning to attach to this fact, but the fact was first discovered.
Or is that what you were saying: that we discover mathematical facts, but in fact what we call "mathematics" is the invention of meaning that we attach to certain favored facts?
I don't see how Pennyology proves your point: a pennyologist discovers that there's an O on the front and an O on the back. Perhaps he invents meaning to attach to this fact, but the fact was first discovered.
Or is that what you were saying: that we discover mathematical facts, but in fact what we call "mathematics" is the invention of meaning that we attach to certain favored facts?