[alganet]

If you work not only the primes, but also the modulus function value of each non-prime, things get even more interesting than thinking of base changes! To me, it reveals much more.

[alganet]

Also, rearrangements.

In two dimensions is easier.

I cannot rearrange one pebble.

I can rearrange two or three pebbles equidistant from each other in just one distinct way (inverting the position of a neighbouring pebble).

And so on...

There are many ways to think of natural numbers without actual numbers.