Packing Disks with Consecutive Integer Radii in a Circle
This Demonstration shows the best-known methods for packings for disks with radii for in a circle.
 A. Müller, J. J. Schneider, and E. Schömer. "World Records for the Problem of Packing Discs with Integer Radii." (Mar 26, 2011) www.staff.uni-mainz.de/schneidj/pack2Drecords.