A064539 All...are divisible by 3 but why?

[Pfoertner, Hugo]

-----Original Message-----
From: zak seidov [mailto:zakseidov at yahoo.com] 
Sent: Friday, June 24, 2005 09:25
To: Simon Nickerson; seqfan at ext.jussieu.fr; davidwwilson at comcast.net
Subject: Re: A064539 All...are divisible by 3 but why?

[...]

.... i submitted A109216, 

%S A109216 
3,17,3,3,593,3,3,32993,3,3,2097593,3,3,73,3,3,8589935681,3,3,17,3,3,11,3,3,8
3,3,3,11,3,3,17,3,3,857,3,3,71329,3,3,59,3,3,19,3,3,11,3,3,17
%N A109216 Smallest factor of 2^(2n+1)+(2n+1)^2.
[...]
%O A109216 0
%K A109216 ,base,nice,nonn,
%A A109216 Zak Seidov (zakseidov at yahoo.com), Jun 24
2005

--------

Recently we had a discussion on the use of the "base" keyword. In my opinion
the sequence above is an example where "base" is totally inappropriate,
because the result has nothing to do with the respresentation of the numbers
in a certain base-x system.

Hugo