[seqfan] Re: Another planetary sequence
Neil Sloane
njasloane at gmail.com
Sun Sep 11 18:57:33 CEST 2016
my personal feeling is that that planetary sequence isn't quite interesting
enough
for an OEIS entry. The terms are not integers, and they are certainly
time-dependent.
Of course the OEIS may not be around in a billion years, but still!
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 Sun, Sep 11, 2016 at 12:49 PM, Felix FrÃ¶hlich <felix.froe at gmail.com>
wrote:
> Dear sequence fans
>
> I thought about the following sequence:
>
> Ratio of radius of n-th planet (under the current IAU-definition of planet)
> from the Sun to mean radius of its largest natural satellite, rounded to
> the nearest integer, or 0 if the planet has no natural satellite.
>
> a(1)-a(8) are 0, 0, 4, 308, 27, 23, 32, 18
>
> The true ratios are of course not integer values, but the terms give an
> idea of how large the largest moons of the planets are compared to the
> planets themselves (i.e. these values are still useful for comparison, even
> when rounded to integers in my opinion). The closer the value is to 1, the
> larger the largest moon is relative to its planet. The value for Earth's
> moon is relatively small, meaning the Moon is large relative to Earth.
>
> There are already a number of sequences related to the planets in the OEIS,
> but I would like to hear the opinion of other contributors and/or some of
> the editors before submitting this, mainly because I think the sequence
> will likely be rejected.
>
> It is probably a "dumb" sequence, not really mathematically significant,
> but sometimes such sequences are still enjoyable.
>
> Best regards
> Felix
>
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