Keywords: Margolus toothpick.svg toothpick sequence a two-dimensional fractal growth pattern in which line segments are placed at right angles to the exposed ends of earlier line segments and its emulation by a cellular automaton with the Margolus neighborhood 2013-01-04 22 05 09 own David Eppstein cc-zero Toothpick sequence Files by User David Eppstein from en wikipedia |