Uses the two parametric equations
x = cos(a*t) - pow(cos(b*t),j)
y = sin(c*t) - pow(sin(d*t),k)
to construct 6-parameter icons extruded to 3D
This uses the code for graphing general functions from http://www.thingiverse.com/thing:1376715
The functions are included in https://en.wikipedia.org/wiki/Parametric_equation under 'Sophisticated equations' which shows some explorations of this parametric space for low j and k.
For the printed icons, the values are
Fractional values of a-d will require additional cycles to complete the graph.
The number of possible combinations is in the order of millions, so this could be a bit of a timepit.
I would love to know the proper name for this set of equations.