I’ve established that a_1=1 since a_3=5, but now I’m stuck.
In addition to the solution, I need to know how to prove this with induction.
This just reproduces the odd integers, so a128 = 2*128 - 1 → 255
That is interesting. It looked so complicated.
Here's a derivation of the relation:
NB For the person who posted the question: Please note that this is not a proof by induction!
Thanks Alan :)