# [seqfan] Re: On Formulas

Maximilian Hasler maximilian.hasler at gmail.com
Thu Dec 3 20:30:17 CET 2009

```Yes, of course, on the wiki this will (easily) be possible via a template, e.g.
{{formula | ogf= ... | egf= ... | rec = ... | direct=... }}

once again, either authors respect this formatting directive,
or we can write a bot scanning for "improperly edited" sequences
(e.g. where the fromula is given as
===Formula===
* a(n) = ..
* o.g.f. =  ...
etc)
and doing the necessary changes automatically or semi-automatically.

Maximilian

On Thu, Dec 3, 2009 at 3:18 PM, Olivier Gerard <olivier.gerard at gmail.com> wrote:
> Dear Maximilian,
>
> I think you must consider this idea in the perspective of the OEIS Wiki.
>
> We can have in each relevant sequence article a formula section (this is
> already the case) but with
> a preformated model and a standard order, which can look like a table
> displaying typeset formulae for instance in front of formula types as
> suggested by Frank
> .
> This kind of approach is routinely used in parts of Wikipedia for things
> such as Atomic Elements, Countries, and other categories where
> multiple possible attributes are known and have to be collected in
> a systematic manner.
>
> For instance look at the table on the right of this article:
> http://en.wikipedia.org/wiki/Uranium
>
>
>
> Olivier
>
>
> On Thu, Dec 3, 2009 at 14:50, Maximilian Hasler
> <maximilian.hasler at gmail.com> wrote:
>> I agree that this would be useful, but maybe it cannot be done in the
>> current/ old system of "tags" (1-letter code), probably most among
>> a-z, A-Z are already used....
>> so the current (already "existing") system of "subdivision" is
>>
>> %F a(n) = ... (for direct formula)
>> %F a(n+1) = ... (for recursion)
>> %F o.g.f. = ...
>> %F e.g.f. = ...
>> %F Annn = { n | .... }
>>
>> The software displaying the entries could very easily do some
>> additional formatting (descriptive label in column 1, separate table
>> row...)
>> if authors respect that format.
>>
>> Maximilian
>>
>> On Thu, Dec 3, 2009 at 6:12 AM,  <franktaw at netscape.net> wrote:
>>> One thing I've thought would be nice for some time is to subdivide the
>>> formulas section.  What I'm thinking of is separate entries for direct
>>> computation, recursive computation, ordinary generating function,
>>> exponential generating function, Dirichlet generating function,
>>> asymptotic behavior, and other formulas.
>>>
>>>
>>>
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>>>
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>>>
>>
>>
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>
>
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```