Another approach would be using the "inverse" of the formula and then trying to prove that you can build all natural numbers starting from 1. This approach, li

Another approach would be using the "inverse" of the formula and then trying to prove that you can build all natural numbers starting from 1. This approach, like every other approaches, did not yield any significant result. The funny thing is that it fits right in the P=NP problem: easy to verify, hard to solve :)