[seqfan] Re: A new sequence?

Claudio Meller claudiomeller at gmail.com
Wed Feb 5 18:10:47 CET 2014


Ok, I submitted, A237263
El 05/02/2014 12:28, "Neil Sloane" <njasloane at gmail.com> escribió:

> It should probably start with 2:
>
> 2, 31, 19, 23, 139, 6089, 40949, 13153513, 748105003, 11307204673,
> 202073177599
>
> and have offset 0. To avoid the usual ambiguity in English of the
> word "repeated", the definition might be:
>
> Smallest prime such that if n copies of the final digit are adjoined to the
> number, it remains prime.
>
> Could you submit it?
>
> Thanks!
>
> Neil
>
>
> On Wed, Feb 5, 2014 at 8:58 AM, Claudio Meller <claudiomeller at gmail.com
> >wrote:
>
> > I saw this sequence in
> >
> https://groups.yahoo.com/neo/groups/primenumbers/conversations/topics/25454
> >
> > a[n] is the smallest prime that remains prime for precisely n times when
> > its final decimal digit is repeated.
> >
> > 31, 19, 23, 139, 6089, 40949, 13153513, 748105003, 11307204673,
> > 202073177599
> >
> >
> >
> > --
> > Claudio Meller
> > http://grageasdefarmacia.blogspot.com
> > http://todoanagramas.blogspot.com/
> > http://simplementenumeros.blogspot.com/
> >
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
>
>
> --
> Dear Friends, I have now retired from AT&T. New coordinates:
>
> 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
>
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>
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