[seqfan] Re: Searching OEIS question

[Neil Sloane]

Frank, sure - send it to me!


On Thu, May 30, 2013 at 1:55 PM, Frank Ruskey <ruskey at cs.uvic.ca> wrote:

> Hi Neil,
> Our search criteria has some non-regular expression aspects to it, so we
> ended up writing a perl script instead.  Actually, my student Sahand Saba
> wrote the script.  Would you be able to run our perl script
> on the database?  We didn't have anything significant to test it on, but
> we think that it is correct.  Thanks!
> -Frank
>
>
>
>
>
>
> On 20/05/2013 2:18 PM, Neil Sloane wrote:
>
>> Frank, I could run a grep or sed command for you on
>> my private copy of the whole database, if you
>> send me a command to run
>>
>>
>> On Mon, May 20, 2013 at 4:35 PM, Frank Ruskey <ruskey at cs.uvic.ca> wrote:
>>
>>  I am trying to find all "nested recurrence relations" that occur in OEIS.
>>> These have the form  a(n) = ....a(..... a ( ..... ) ..... )  where the
>>> parens are nested as shown.
>>> How to do this in a semi-intelligent fashion?  I started just trying to
>>> find entries
>>> that contained "a(a(".  The trouble is that the oeis seems to treat "("
>>> as
>>> a wildcard.
>>> Is there some way to force it to recognize the "(" character?  Or search
>>> for the
>>> more general expression at the beginning of this message?  Thanks for any
>>> help.
>>> -Frank
>>>
>>> --
>>> ----------------------
>>> Frank Ruskey         e-mail: (last_name)(AT)cs(DOT)uvic(****DOT)ca
>>>
>>> Dept. of Computer Science        fax:    250-472-5708
>>> University of Victoria           office: 250-472-5794
>>> Victoria, B.C. V8W 3P6 CANADA    WWW: http://www.cs.uvic.ca/~(last_***
>>> *name) <http://www.cs.uvic.ca/~(last_**name)><http://www.cs.uvic.ca/~**
>>> (last_name) <http://www.cs.uvic.ca/~(last_name)>>
>>>
>>>
>>>
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>>>
>>> ______________________________****_________________
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>>>
>>
>>
>
> --
> ----------------------
> Frank Ruskey         e-mail: (last_name)(AT)cs(DOT)uvic(**DOT)ca
> Dept. of Computer Science        fax:    250-472-5708
> University of Victoria           office: 250-472-5794
> Victoria, B.C. V8W 3P6 CANADA    WWW: http://www.cs.uvic.ca/~(last_**name)<http://www.cs.uvic.ca/~(last_name)>
>
>
> --
> This message has been scanned for viruses and
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> believed to be clean.
>
>
>
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-- 
Dear Friends, I have now retired from AT&T. New coordinates:

Neil J. A. Sloane, President, OEIS Foundation
11 South Adelaide Avenue, Highland Park, NJ 08904, USA
Phone: 732 828 6098; home page: http://NeilSloane.com
Email: njasloane at gmail.com