[seqfan] Re: A098550.

Antti Karttunen antti.karttunen at gmail.com
Tue Dec 2 18:40:33 CET 2014


On Tue, Dec 2, 2014 at 3:11 PM,  <seqfan-request at list.seqfan.eu> wrote:

> Message: 11
> Date: Mon, 1 Dec 2014 22:17:54 -0500
> From: Neil Sloane <njasloane at gmail.com>
> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> Subject: [seqfan] Re: A098550.
> Message-ID:
>         <CAAOnSgSR74Wq-t34ajxf3jzKV-wdJZAB0KZy05kWMvVd4tubxQ at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Hans, I never thought of that. Nice.
>
> What about the following related sequences:
> - length of loop if you start at n
> - high-water mark in loop starting at n
>
> (I'm writing this without actually seeing the loops)
>
> The reason for adding these seqs to the OEIS (please!) is that if we keep
> doing this, sooner or later one of these sequences from one of these
> problems is going to match a sequence
> from one of the other problems, and we will have a remarkable theorem
>
> (or, to use Barry Cipra's phrase, if one of these fingerprints
> turns up in an unrelated crime scene, we will learn something!)

I would even say: The less likely a sequence is to be related to
anything else, the higher its serendipity-value is, if it ever _does_
appear in another problem.


BTW,

what are the deadlines when voting for A250000, and what is the
timespan for AMS/MAA "the best new formula/recurrence/gf competition"?
E.g. will any new formula added in 2014 do? Or does it have to be
added after the official announcement?


Best,

Antti


>
> 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
>



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