[seqfan] Re: Sister sequences

[Reinhard Zumkeller]

. . .  negative values. Is this a bug? >
I don't think so. A232221(n) < 0 for n > 13195, from this follows that
peaks are below sea level for n > 76. See 2nd example in A232361.


2013/11/24 Neil Sloane <njasloane at gmail.com>

> Reinhard - thanks, nice work.
>
> I added A232359 and A232361 to the cross-refs line in A232221 - I believe
> that any sequence mentioned in the entry should also be listed in the
> CROSSREFS line.
> This is helpful, even essential, when searching
> for sequences that mention a given sequence.
>
> About the "graph" for A232361, it sems to show negative values. Is this a
> bug?
>
> Neil
>
>
> On Sun, Nov 24, 2013 at 3:39 PM, Reinhard Zumkeller <
> reinhard.zumkeller at gmail.com> wrote:
>
> > I just added A232361 and A232359 for peak values in A232221.
> > Best regards
> > Reinhard
> >
> >
> > 2013/11/24 Veikko Pohjola <veikko at nordem.fi>
> >
> > > The mutual behavior of these sisters becomes easier to assess by
> > > examining, instead of the difference, what happens to the ratio, which
> of
> > > course is no more an integer sequence. It appears (appears) to
> approach a
> > > limit.
> > > Veikko
> > >
> > > Hans Havermann kirjoitti 24.11.2013 kello 4.20:
> > >
> > > > Veikko Pohjola:
> > > >
> > > >> The first 400 or so terms would make one expect a steady growth but
> at
> > > n=425, the curve, at value 590868, starts a dive to make a short visit
> > > below zero at n=941 and then starts to grow again. This time it stays
> > > positive positive up to about n=13000 and then dives really deep to the
> > > negative, and that trend continues far beyond n=200000...
> > > >
> > > > One has to smile because that "really deep" becomes *really shallow*
> in
> > > the larger context. :)
> > > >
> > > > http://chesswanks.com/num/A232221-2.png
> > > >
> > > >
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>
> --
> 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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