puzzle sequences

[Floor en Lyanne van Lamoen]

Dear SeqFans,

Here is another Ask Dr. Math puzzle sequence:

5 15 365 945 ...

I have no clue.

Kind regards,
Floor.

> -----Oorspronkelijk bericht-----
> Van: Joshua Zucker [mailto:joshua.zucker at gmail.com]
> Verzonden: donderdag 24 november 2005 09:55
> Aan: Sequence Fans
> Onderwerp: puzzle sequences
> 
> I am a volunteer for Ask Dr Math, so I often get puzzle sequences sent
> in.  Most of them are pretty easy, and I can figure them out myself,
> or the OEIS search/superseeker takes care of them.
> 
> But a few stump me and superseeker too.  Sometimes typos cause the
> problems.  Sometimes I just have no idea.  Most of them come from high
> school classrooms.  Maybe some of them don't have any pattern and are
> just practical jokes.
> 
> Here's a few that have stumped me lately.  If you have any ideas,
> please let me know so I can help these students (and me!) learn
> something.  As far as I know, none are related to each other in any
> way.
> 
> Thanks,
> --Joshua Zucker aka Dr. Schwa at http://mathforum.org/dr.math
> 
> 1000, 72, 5, 25, 7  Hint: other patterns from this student included 1,
> 5, 10, 25, 50 (money) and 60, 60, 24, 7, 52 (time, though I think that
> 52 is a bit arguable!  52 1/7?  52 5/28?  or something even more
> exact?  But whatever, call it an integer sequence and it's 52 I
> guess.).
> 
> 
> 
> 30 28 32 38 40 42 46 52 60 60 64 68
> 
> 
> 
> 7,8,4,6,25,26,13,15