Python Challenge 10?

[Tim Peters]

[Greg Ewing]
> Can someone give me a hint for No. 10? My MindBlaster
> card must be acting up -- I can't seem to tune into
> the author's brain waves on this one.

There are hints on the site; for level 10,

    http://www.pythonchallenge.com/forums/viewtopic.php?t=20

> I came up with what I thought was a perfectly good
> solution, but apparently it's wrong. :-(

The On-Line Encyclopedia of Integer Sequences should be better known
-- it's an amazing resource:

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

It knows about this sequence, so don't use it unless you want the
answer given to you.  If it doesn't know about your sequence,
"perfectly good" is debatable <wink>.