: Primefree sequences in the OEIS. A bad idea.

[franktaw at netscape.net]

No, not really.  If I want to search, for example, only for sequences with the "mult" keyword, searching for "mult" as part of a compound search will find many more false matches (where some word including "mult" is used in the description, or comments, or ...) than real ones.
 
Franklin T. Adams-Watters
16 W. Michigan Ave.
Palatine, IL 60067
847-776-7645
 
 
-----Original Message-----
From: Alexandre Wajnberg <alexandre.wajnberg at skynet.be>
To: franktaw at netscape.net; baruchel at bluebottle.com; Seqfan <seqfan at ext.jussieu.fr>
Sent: Mon, 31 Oct 2005 02:32:04 +0200
Subject: Re : Primefree sequences in the OEIS. A bad idea.





It would be useful to have some keyword-related searches in the advanced lookup.  (I'm referring to the keywords defined in the database here.)  I'd like at least the following:
 
* Search for a word, including only sequences with at least one keyword from a list.
* Search for a word, excluding any sequence which has any of a list of keywords.
* Search for a sequence of numbers, excluding any sequence which has any of a list of keywords.
* Search for a sequence of numbers, including only sequences with at least one keyword from a list.

----------------------------
I think all this is possible through the "Boolean search" of the "Advanced look-up".

http://www.research.att.com/~njas/sequences/index2.html 

Simply write the desired word (or sequence of numbers) in the first little window,
And the keyword (or keywords separated by a space) in the second window; 
and choose the desired operator (AND; or NOT).


Alexandre 
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