Thingiverse link: http://www.thingiverse.com/make:80243
Settings: Printed on a Replicator 2 with .3mm/low and normal support settings.
Technical notes, math flavor: This knot was designed and printed by JMU Student Taylor Meador. The images in her description below are from slides of a Knot Mosaic talk from Lew Ludwig of Denison College.
A mosaic projection of a knot is one that can be constructed as a mosaic using any of the 11 possible mosaic tiles: