[seqfan] Re: newbie questions regarding slightly modifying OEIS entries

[Sean A. Irvine]

Hi Andre,

I can have a stab at your questions.

In general, if you have proposals regarding specific sequences, then simply
edit those sequences and propose the changes.  They will then be reviewed
etc. and there is an opportunity at that point in time to discuss the
merits of the change.  Most changes will also require you to "sign" the
change, correction, addition, etc.  Look in the Wiki for more details:

https://oeis.org/wiki/Style_Sheet

With regard to cross references, we do not require they be symmetric.  This
is particularly important for certain core sequences, for example, many
sequences reference the primes (A000040) but we certainly do not want
A000040 pointing at every sequence mentioning primes.  Note that from a
sequence, you can get all those that point at it by clicking the "refs"
link following the Data.  The specific ones you suggest may make sense.

Essentially every change is reviewed by at least one person.  For a more
complicated change, it is not unusual for multiple editors to comment.

Long-lived sequence numbers are not reused or reallocated  (old sequences
can sometimes be marked "dead" if they turn out to be erroneous or
duplicates).  Newer sequences are sometimes reassigned -- usually because a
sequence is rejected or found to be a duplicate.  It's a judgement call
based on how likely it could be that the sequence number has been used
elsewhere.  Thus, the only opportunity to assign similar sequence numbers
to related sequences is when they are first submitted.

One last point, if you are a new user you will have a limited number of
edits you can active at any one time.  So you will want to be selective
about the changes you propose.  I would recommend starting with a simple
change, until you understand the process.

Hope this helps,
Sean.



On Sat, 2 Jan 2021 at 08:49, andre maute <andre.maute at gmx.de> wrote:

> Happy new year!
>
> I'm new to the list, so please forgive me my perhaps naive questions.
>
> Question 1:
> I'm wondering what has to be done, if one wants to update the cross
> references
> for the following entries
>
> http://oeis.org/A000085, has no Cf to the other two
> http://oeis.org/A000704, has no Cf to the other two
> http://oeis.org/A001465, has Cf to A000085 and to A000704
>
> Question 2:
> regarding A000704
> a(n) = Sum_{i = 0..floor(n/4)} C(n, 4i)*(4i-1)!!
> I had some minor problems with GNU Maxima due to the factor (-1)!! for i=0.
> Would it be possible to slightly change this factor
> from
> (4i-1)!!
> into
> (4i)!/(4i)!!
> This would also better correspond with the one given in A001465
> a(n) = Sum_{i=0..floor((n-2)/4)} C(n,4i+2)*(4i+2)!/(4i+2)!!
>
> Question 3+4:
> regarding A001465 and A000704
> would it be possible to slightly change the corresponding Mathematica code
> of A001465 also?
> and add a corresponding Mathematica code snippet for A000704?
>
> Question 5:
> Does every modification to an OEIS sequences gets somehow reviewed?
>
> Question 6:
> A000704 and A001465 are somehow dual to each other.
> Do sequence numbers sometime get reassigned, perhaps to reflect such
> symmetries?
>
> Regards
> Andre
>
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