[seqfan] Re: OEIS Wiki: Offsets

[Neil Sloane]

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?!

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?

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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