[seqfan] Re: Mystery tour with a(n)=sigma(a(n-1))
mathar at strw.leidenuniv.nl
Wed Feb 17 18:06:29 CET 2010
A bystander's comment on
One can draw a type of sociology diagram of which numbers
join under the map n->sigma(n) after some time.
An example, showing only the fragments involving the first
few hundred numbers, is displayed in the PostScript file
(This does not tell us anything beyond what was already
The in-degrees of the nodes illustrate http://www.oeis.org/classic/A054973 .
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