[seqfan] Re: OEIS Wiki: Offsets

Neil Sloane njasloane at gmail.com
Tue Apr 14 06:21:27 CEST 2015


Done (but -50 to +50 only, otherwise too big), see A256958 - OK?

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 14, 2015 at 12:14 AM, Rick Shepherd <rlshepherd2 at gmail.com>
wrote:

> On Apr 13, 2015 11:54 PM, "Neil Sloane" <njasloane at gmail.com> wrote:
> >
> > At least in the days, an A-number A000000 would
> > break the system.
> >
> > About your suggestion that there should be an entry for
> > -4,-3,-2,-1,0,1,2,3,4,, where would it start?!
> >
>
> I was thinking along the same lines as what you've suggested below (not
> necessarily with even that many terms).
>
> > Although I guess we could have an entry that goes from -100 to +100,
> > which would match most of those submissions.  With a name like
> > "Central 201 terms of the positive and negative integers"
> > with a comment "See A000027 for more terms",
> > and offset -100.  Shall I create it?
> >
>
> Yes, I myself think this makes sense in this very special case. Thanks.
>
> > 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 Mon, Apr 13, 2015 at 11:42 PM, Rick Shepherd <rlshepherd2 at gmail.com>
> > wrote:
> >
> > > While considering our unwritten assumptions, I realized that I don't
> recall
> > > ever seeing instructions for offset usage that explicitly say the index
> > > always increases beginning with the offset value (at least for non-cons
> > > seqs). Is there a need to document the preferred way of submitting a
> > > sequence whose indices are, say, only negative (or to discourage this)?
> > > Similar question for would-be sequences whose indices can be all the
> > > integers...
> > >
> > > In fact, if I didn't just overlook them, the OEIS doesn't contain a
> > > sequence called "The integers" or "The nonzero integers".
> Nevertheless, I
> > > can imagine someone possibly searching for -4,-3,-2,-1,0,1,2,3,4,
> expecting
> > > to find the former at least (By the way, this would seem to be an
> excellent
> > > candidate for A000000 if such sequences were permitted (and if A000000
> were
> > > a valid A-number)).
> > >
> > > Best regards,
> > > Rick
> > >
> > > _______________________________________________
> > >
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> > >
> >
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