OCA:Rule 22

Rule 22
x=0, y = 0, rule = W22 ! #C [[ THEME Inverse ]] #C [[ RANDOMIZE2 THUMBLAUNCH THUMBNAIL THUMBSIZE 2 GRID ZOOM 6 WIDTH 600 HEIGHT 600 LABEL 90 -20 2 "#G" AUTOSTART PAUSE 2 GPS 8 LOOP 256 ]] LifeViewer-generated pseudorandom soup
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Number	22
Computation	p⊕q⊕r⊕p∧q∧r
Character	Chaotic
Black/white reversal	151
Left/right reflection	22

Wolfram's Rule 22 (or W22) is the 2-state 1-D cellular automaton in which a cell is ON in the next generation if and only if exactly one of its three neighbours is ON in the current generation (a cell being counted as a neighbour of itself). This is the behaviour of Life on a cylinder of width 1.

Unlike Rule 90, Rule 22 is capable of explosive growth given a sufficiently chaotic input.

External links

• Rule 22 at the Life Lexicon