I've been playing around with packing things, and ran across Erich Friedman's site: http://www.stetson.edu/~efriedma/packing.html I wrote a program to pack unit squares into circles: http://lunkwill.org/src/square-in-circle/ It even generates SVG images of the smallest circles it can find that support a given number of squares (svg is neat!). They're in the svg/ directory, but my browser doesn't like to display them, so I converted them into .PNGs as well. An interesting integer sequence might be the number of unit squares that pack into circles of increasing integer radii. My program gives that sequence as the following for circles of r=1..19: 0,8,21,40,65,97,135,180,229,286,350,419,495,575,664,761,860,966,1079 (but it might be off by a few). -J