[seqfan] Re: The most and least interesting sequences not in OEIS

[Andrew Weimholt]

I think BOTH of those sequences are the least interesting ones not in the
OEIS,
and should stay out of the OEIS.


On Mon, Sep 17, 2018 at 6:22 AM Keith F. Lynch <kfl at keithlynch.net> wrote:

> Here is the most interesting sequence I know of that is not in OEIS:
>
> 0  -250
> 1  1400
> 2  1706
> 3  1949
> 4  1958
> 5  1961
> 6  1973
> 7  1983
> 8  1987
> 9  1989
> 10 1997
> 11 1999
> 12 2002
> 13 2011
>
> The nth term is when pi was first known to have been correctly
> calculated to at least 10^n decimal places (or the equivalent
> precision in some other notation).  It really shows the astonishing
> progress in computer hardware and software.
>
> The 0th term is very uncertain.  Pi has been known to 10^0 place
> precision for a very long time, but Archimedes is the first person
> known to have *calculated* pi rather than measured it.  I'm not sure
> in which decade he did so, but at least I have the century right.
>
> I wonder what the future of this sequence looks like.  When and what
> will the last term be?  Or will it keep growing literally forever?
>
> It was rejected from OEIS.  I can understand why, since it isn't math,
> even though it's about math.  But then why are A000053 or A007826 there?
>
> And here's the *least* interesting sequence I know of that is not
> in OEIS:
>
> 17,11,19,24,30, 4,17,27,21,23,
> 26, 1, 6, 3, 2, 7,11,10,23,28,
> 27,26,25,30,29,28,27,25, 1,30
>
> The nth term is the day of the month that the nth season of The
> Simpsons began (or will begin) on.  On noticing that the upcoming 30th
> season is to begin on the 30th (of this month), I wondered if the nth
> season had ever begun on the nth of the month before.  The a priori
> odds are about 1 - (29/30.5)^29, which is about 0.77, so I figured it
> most likely happened exactly once before.  And sure enough, it did.
>
> I have not submitted this sequence, and don't intend to.  I did check,
> and sure enough it's not already there.  If someone else wants to
> submit it, feel free to take the credit -- or the blame, as the case
> may be.
>
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