# [seqfan] Re: A055458: solution to phi(c+46)=c+46 for composite c

Robert G. Wilson v rgwv at rgwv.com
Tue Apr 28 20:56:55 CEST 2015

```Et al,

No b text file should use this convention. But an a text file could be supplied which does include this convention with no harm. That way when certain values are found, they can be reported.

Bob.

-----Original Message-----
From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of Neil Sloane
Sent: Tuesday, April 28, 2015 1:47 PM
To: Sequence Fanatics Discussion list
Cc: seqfaneu
Subject: [seqfan] Re: A055458: solution to phi(c+46)=c+46 for composite c

> I think it an ill practice to insert -1 for unknown values. This way
> many
sequences in the OEIS can be "extended" with -1's.
The sequence should be truncated at the first unknown value.

I totally agree with Max.  I will edit A055458

Best regards
Neil

Neil J. A. Sloane, President, OEIS Foundation.
11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
Email: njasloane at gmail.com

On Tue, Apr 28, 2015 at 12:31 PM, Max Alekseyev <maxale at gmail.com> wrote:

> I think it an ill practice to insert -1 for unknown values. This way
> many sequences in the OEIS can be "extended" with -1's.
> The sequence should be truncated at the first unknown value.
> Regards,
> Max
>
>
> On Tue, Apr 28, 2015 at 10:43 AM, Richard J. Mathar
> <mathar at mpia-hd.mpg.de
> >
> wrote:
>
> > Does anyone have information of the values of A055458 at n=23, 35,
> > 49, 59, 61,...? Are there composite c such that phi(c+46)=c+46, for
> > example?
> >
> > RJM
> >
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
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