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

[Neil Sloane]

> 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.
Phone: 732 828 6098; home page: http://NeilSloane.com
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
> >
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