Maybe I just don't grok the pattern tools...

I wish to make a pattern, where each element is a circle, all concentric, and of varying sizes.   (Like a bullseye)

So Circle#1 has a center at x=0 y=0 and a radius of 1mm.

Circle#2 has a center at x=0 y=0 and a radius of 2mm.

etc.

I don't want to draw 100 of these manually.   Is there some form of the pattern commands (or some other tool?) to do this?