/usr/share/k3d/lsystem/fractint3.ls is in k3d-data 0.8.0.3-3build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | # --- L-System Parser/Mutator --- Lj Lapre ----------------------------------
# Sierpinski1
5
120
10
&(90)+(90)F
F=FXF
X=+FXF-FXF-FXF+
@
|