Primes sorted by relation of largest divisors of p+-1
Hugo Pfoertner
all at abouthugo.de
Sun Feb 20 19:11:50 CET 2005
"Franklin T. Adams-Watters" wrote:
>
> But what about primes p such that the number of divisors of p-1 is equal to the number of divisors of p+1?
That was mentioned at the end of my first message:
BTW, equal number of divisors is
http://www.research.att.com/projects/OEIS?Anum=A067889
Is there any explanation for Benoit Cloitre's observation for this
sequence:
a(n) seems curiously to be asymptotic to 25*n*Log(n) ?
I forgot to include this X-Ref in the submitted two sequences.
Hugo
>
> Hugo Pfoertner <all at abouthugo.de> wrote:
>
> >Thanks to all who replied; the sequences will be A103664 & A103665. I've
> >added a first term a(1)=2 (proposed by Vladeta Jovovic) in
> >%S A103664 2 3 5 11 17 23 29 47 53 59 ...
> >%N A103664 Primes p such that the number of divisors of p-1 is less than
> >the number of divisors of p+1
> >plus Mathematica Coding by Wouter and RGWv.
> >
>
> --
> Franklin T. Adams-Watters
> 16 W. Michigan Ave.
> Palatine, IL 60067
> 847-776-7645
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