nice, obscure and more terms needed, polyomino sequences

[Ralf Stephan]

> It seems the 2000 web page of Vicher has vanished. Did anyone
> save a copy (or can anyone find an archived copy on the web)?

It's here but the problem is the whole page tree is gone, so also
the referenced pictures can not be accessed.  At least the numbers:

http://web.archive.org/web/20050308045212/http://alpha.ujep.cz/~vicher/puzzle/polyforms.htm

The pages were accessed from many places, I wonder why it's all gone.


ralf