[seqfan] Re: Divisibilty sequences

franktaw at netscape.net franktaw at netscape.net
Mon Mar 30 02:55:59 CEST 2009

The greatest number of sequences with this property, I think, are the 
sequences consisting only of 0's and 1's, followed by all "cons" 
sequences and all periodic and eventually periodic sequences (which 
latter includes continued fractions for quadratic surds).  This is a 
pretty substantial slice of the OEIS.

Note that you can include, e.g., -seq:5 in your search to exclude all 
sequences containing the number 5.  So if you know your sequence 
consists only of 1, 2, 3, and 4 (and does include all of them), you 
could search seq:1 seq:2 seq:3 seq:4 -seq:5 -seq:6 -seq:0.  There will 
be some false hits, but it will cut down your search space as least as 
much as this keyword would.

Franklin T. Adams-Watters

-----Original Message-----
From: Joerg Arndt <arndt at jjj.de>

I meant (infinite) seqs that have finitely many values only.
E.g. all under "fixed points of mappings" in

I recently toyed around with related seqs and it appears
that there is some room for improvement with searching here.

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