Hello from Japan.
In my web site, I have a log of halos and atmospheric optical phenomena observations.
Many (Japanese) people send me their observations, from ordinary ones like 22-degree halo to very rare ones.
Here I introduce two cases of odd radius halos in my site. I'm sorry that descriptions in the pages are written in Japanese, but you can see photos of halo displays anyway.
May 17, 2005, Odd Radius Halos in Yanai (top image of this article)