A000040|A014686

[Eric DESBIAUX]

2 2 6 6 10 10 14 14 18 18 22 22... is in database?
 3 3 7 7 11 11 15 15 19 19 23 23... is in database? 
 
 

> Message du 26/04/08 02:40
> De : "Maximilian Hasler" 
> A : "Eric" 
> Copie à : seqfan at ext.jussieu.fr
> Objet : Re: A000040|A014686
> 
> Trivially, for any sequence a(i), if
> b(i) = a(i) + (-1)^i
> then sum(a(i),i=1..2k) = sum(b(i),i=1..2k)
> 
> On Sat, Apr 26, 2008 at 2:31 AM, Eric  wrote:
> 
> >  In sequence of prime numbers add 1 to first prime, 3rd prime, fifth prime,
> >  ... then subtract 1 from 2nd prime, fourth prime, sixth prime and so on.
> >  [3,2,6,6,12,12,18,18,24,28,32,36,42,42,48,52,60,
> >   60,68,70,74,78,84,88,98,100,104,106,110,112,128,
> >   130,138,138,150,150,158,162,168,172,180,180,192,
> >   192,198,198,212,222,228,228,234,238,242,250,258,
> >   262,270,270]
> >
> >  sumA014686 = sumA000040 = 7141
> >  (n<=58)
> 
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.seqfan.eu/pipermail/seqfan/attachments/20080426/b3d3bd20/attachment-0001.htm>