[seqfan] Re: Quadratics in the OEIS

Charles Greathouse charles.greathouse at case.edu
Tue Aug 31 15:35:55 CEST 2010

I hadn't noticed that, Richard.  Does anyone else have thoughts about
eventually-recurrent sequences?  I had planned to put them in some
category paralleling
which I created for this sort of purpose, but maybe they should all be combined.

Arguments for combining:
* That's how we're doing it now -- or at least how Richard is doing it now
* There aren't too many sequences like this: no need for a hierarchy
with just a few members

Arguments against combining:
* The basic relation a(n) = An^2 + Bn + C is lost -- you can no longer
expect that just because a sequence is in the category you can
calculate terms from any three

Similarly, what about other eventually-foo sequences?  nonn?

Charles Greathouse
Case Western Reserve University

On Tue, Aug 31, 2010 at 8:30 AM, Richard Mathar
<mathar at strw.leidenuniv.nl> wrote:
> http://list.seqfan.eu/pipermail/seqfan/2010-August/005884.html
> cg> those separately) I removed the sequences I found that weren't right,
> cg> to wit: A050267, A094914, A105340, A107973, A115535, A132337, A158865,
> cg> A168028.  More details are on the page itself.
> Note that A094914 is in the recLCC index because it obeys a polynomial
> definition *after*omitting*a*finite*number*of*initial*terms.
> This strict definition applies to all sequences that I've gathered in the
> index.
> Richard Mathar
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> Seqfan Mailing list - http://list.seqfan.eu/

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