Mod 3 [cellular automaton] rule

Code 420 is an example of an additive rule, and yields a pattern corresponding to Pascal's triangle modulo 3, as discussed on page 870.

Mod 3 [cellular automaton] rule

Code 420 is an example of an additive rule, and yields a pattern corresponding to Pascal's triangle modulo 3, as discussed on page 870.

From Stephen Wolfram: *A New Kind of Science* [citation]