Designer:
Mark A. Reynolds
California, USA

This is a cool way to get to the harmonic mean, even though the units change size. The Mean is 3,4,6, with 6 on the outside, 3 being the little diamond in the center, and 4 being the square that's skewed.

Mark Reynolds was the designer of two previous logos for Nexus: 

Nexus 2002

Nexus 2004

More of his work can be seen on his website, www.markareynolds.com.