a graph puzzle

[Maximilian Hasler]

sorry, I noticed too late that I would have spoiled the fun by doing a
"reply all"
- fortunately, my solution is not correct for nodes beyond
predecessors of those of type (1,n), and I won't post the update to
seqfan... so you can continue the happy guessing about the "fireworks
graph", and :

Happy Easter to all SeqFans !

M.H.

On Sat, Mar 22, 2008 at 9:10 AM, Max Alekseyev <maxale at gmail.com> wrote:
> Good morning,
>
>  I've generated a graph on the unordered co-prime pairs of non-negative
>  integers below 30,
>  using some quite "natural" mapping.
>
>  The graph has quite nice and somewhat fractal structure:
>  http://img505.imageshack.us/img505/4065/3cbv7.jpg  (its size is ~ 800KB)
>
>  Can you guess what is the underlying mapping "hidden" in this graph?
>
>  Regards,
>  Max
>
>  P.S. I hate puzzles like this one but maybe you like ;)
>
>  P.S. Actually, my concern is whether this mapping is present in OEIS
>  in either form.
>