[seqfan] Re: submitting sequences with sets as terms

Neil Sloane njasloane at gmail.com
Sun Mar 22 18:58:42 CET 2015


Bob or Alonso, Could you take care of this (excellent) suggestion:

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.

(I am a little busy right now)

Thanks




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, Mar 22, 2015 at 12:36 PM, Bob Selcoe <rselcoe at entouchonline.net>
wrote:

> 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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