Look at this beautiful blanket !!!

[Autumn]

I found it. (On Project Linus) but, if someone would be nice enough to tell me, what is the "formula"? You know... multiple of (blank) + (blank)

 

If you look on this site, it looks like it is a multiple of 10 + 7 for the pattern she used.

 

http://madcrochetingfool1.blogspot.com/2008/08/catherines-wheel-pattern.html

 

I saw in another place too, that the stitch pattern can be found in the stitch book called:

Harmony Guides 300 Crochet Stitches