[seqfan] Re: submitting sequences with sets as terms

Bob Selcoe rselcoe at entouchonline.net
Sun Mar 22 17:36:51 CET 2015


Thanks, Alonso and Neil!

I will use "tabf" for this sequence.

Neil, this may be best addressed by you - Although the answer was on the 
"Keyword" page, I wouldn't have thought to look there (and I'm not even sure 
where it is; When I click on "Wiki" or "Index", I don't see anything like 
"keywords", let alone "Clear-cut_examples_of_keywords" under Wiki, which is 
where Alonso's link directs).

Might I suggest including answers to this question, and perhaps other 
related questions, on the "Style Sheet" wiki page?  That seems like an 
appropriate place to look for such answers.

Thanks,
Bob

--------------------------------------------------
From: "Neil Sloane" <njasloane at gmail.com>
Sent: Sunday, March 22, 2015 10:48 AM
To: "Sequence Fanatics Discussion list" <seqfan at list.seqfan.eu>
Subject: [seqfan] Re: submitting sequences with sets as terms

> Bob,
> Alonso already answered your question, but here are some further remarks:
>
> There are 4 standard ways to do that:
>
> 1.  Sequence giving smallest prime divisor of a(n).
>
> 2.  Sequence giving largest prime divisor of a(n).
>
> 3.  Sequence listing the distinct primes dividing a(n), in increasing
> order, as an irregular triangle, with keyword tabf, as in Alonso's reply.
> In this case that would be
> 2, 3, 2,3, 2, 3,5, ...
>
> 4. Sequence listing all primes dividing a(n), with repetition, in
> increasing order, as an irregular triangle, with keyword tabf, as in
> Alonso's reply. In this case that would be
> 2,3,2,2,3,3,2,2,2,3,5,...
>
>
>
> 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 Sat, Mar 21, 2015 at 3:26 PM, Bob Selcoe <rselcoe at entouchonline.net>
> wrote:
>
>>
>> Hi Seqfans,
>>
>> I was hoping for some clarification about submitting sequences with sets
>> as terms.
>>
>> For instance, the sequence of prime factors of A098550(n) n>1 is  {2}, 
>> {3}
>> {2}, {3}, {2}, {3,5}, {2,7}, {5}, {2,3}...
>>
>> Is there a preferred format for such sequences?
>>
>> Thanks in advance,
>> Bob Selcoe
>> PS - is there a page on the site which addresses this? I couldn't find it
>> from the OEIS Wiki page.
>>
>> _______________________________________________
>>
>> Seqfan Mailing list - http://list.seqfan.eu/
>>
>
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>
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