No, it’s a normal multiplication by 3, and it makes sense.
3 times the sum expands to: 3 * 1/4 + 3 * 1/16 + 3 * 1/64 + 3 * 1/256 + …
Which is essentially what the picture shows: The main meme is three quarters filled with whole pictures, the fourth quarter being the inset of the sub meme, which is made up of three sixteenths of whole pictures and the fourth sixteenth is made up of the next layer of inset meme etc.
You haven’t mentioned what sort of access link or speed you have, that seems very relevant here.
For my 1Gbit/s fiber connection the Edgerouter 6P has been pretty good. It has an SFP port and can route 1 Gbit/s of traffic without issue and my dual-stack setup works well too.
The only significant downside is that its switching is slow, it has no hw support. So I put my NAS on a separate subnet instead so that the traffic to it can be routed instead.