[seqfan] Re: easy and bref

[Charles Greathouse]

> While "more" and "unkn" may be accompanied by "hard", "hard" does not
> specify whether the difficulty is computational or analytical.
I discuss this at
https://oeis.org/wiki/User:Charles_R_Greathouse_IV/Keywords/easy_and_hard
Increasingly, the keyword is being used not only for sequences where
"it's not known" how to find more terms (getting another would be
worth publishing a paper), but also for sequences where it's merely
difficult to find more terms, even if the process itself is
straightforward.

Charles Greathouse
Analyst/Programmer
Case Western Reserve University

On Thu, Sep 29, 2011 at 11:18 PM, Donald Alan Morrison
<donmorrison at gmail.com> wrote:
> Some points of confusion in keywords (perhaps already mentioned before):
>
> While "more" and "unkn" may be accompanied by "hard", "hard" does not
> specify whether the difficulty is computational or analytical.  "fini"
> is helpful of course.  Maybe a new keyword like "comphard" would be
> useful.
>
> "word" can intersect any of "uned"/"new"/"obsc" which seem redundant
> (among themselves).
>
> On Thu, Sep 29, 2011 at 7:16 PM, Alonso Del Arte
> <alonso.delarte at gmail.com> wrote:
>> Those who know French or Latin might be able to help with some sequences
>> having keywords easy, more and word. Yesterday I knocked more off such a
>> sequence dealing with Portuguese (even though I don't know Portuguese)
>> because it seemed to me that given how big the terms presently in the
>> sequence are, larger terms would run into questions of non-standard names
>> for larger numbers.
>>
>> Al
>>
>> On Thu, Sep 29, 2011 at 8:32 PM, Charles Greathouse <
>> charles.greathouse at case.edu> wrote:
>>
>>> I encourage people to remove the "easy" keyword from sequences that
>>> don't deserve it (and to add it to those that need it, of course).  If
>>> you can't even make a thousand-term b-file it's probably not easy
>>> (unless the terms are just too big to fit).
>>>
>>> Charles Greathouse
>>> Analyst/Programmer
>>> Case Western Reserve University
>>>
>>> On Thu, Sep 29, 2011 at 7:38 PM, Joseph S. Myers <jsm at polyomino.org.uk>
>>> wrote:
>>> > On Mon, 26 Sep 2011, Nathaniel Johnston wrote:
>>> >
>>> >> Dear SeqFans,
>>> >>
>>> >> Another keyword combination that is quite ugly to my eye is "easy" and
>>> >> "more". I've cleaned up quite a few of these by adding more terms, but
>>> there
>>> >> are still 291 remaining. Most of these sequences still contain both
>>> keywords
>>> >> for one of two reasons: either the sequence is difficult to understand
>>> >> and/or needs editing by someone with expertise in the area (such as
>>> >> A002875), or it is "easy" to construct small terms by hand but writing a
>>> >> program to compute terms seems to be a nontrivial task (such as
>>> A072149).
>>> >
>>> > I've submitted extensions and b-files for A072149-A072151 - they aren't
>>> > that hard to program; A072152-A072154 to follow later.  I haven't tried
>>> to
>>> > determine their generating functions, though they will certainly have
>>> > rational generating functions.
>>> >
>>> > There are 238 easy+more sequences left - I think most are probably
>>> > genuinely easy once you've understood them (which is the nontrivial part
>>> > in many cases).  Some look "easy" to add a few more terms to but not to
>>> > extend to the full three rows let alone to 1000 terms in a b-file
>>> > (A092645, for example).  It might be interesting to see what "easy"
>>> > sequences there are that are significantly short of the normal three rows
>>> > of numbers but aren't marked "more" (more generally, if a sequence is
>>> well
>>> > short of three rows of numbers but isn't "full", it's a candidate for
>>> > "more" unless it's known the next number would take it over three rows).
>>> >
>>> > --
>>> > Joseph S. Myers
>>> > jsm at polyomino.org.uk
>>> >
>>> > _______________________________________________
>>> >
>>> > Seqfan Mailing list - http://list.seqfan.eu/
>>> >
>>>
>>> _______________________________________________
>>>
>>> Seqfan Mailing list - http://list.seqfan.eu/
>>>
>>
>>
>>
>> --
>> Alonso del Arte
>> Author at SmashWords.com<https://www.smashwords.com/profile/view/AlonsoDelarte>
>> Musician at ReverbNation.com <http://www.reverbnation.com/alonsodelarte>
>>
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>>
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>>
>
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