rule type | elementary cellular automaton rule space | 2-color, range 1 (3-cell neighborhood) number of rules | 256

| 1 | | 0

left-right | color | both rule 90 | rule 165 | rule 165 (total: 3)

(p, q, r) ↦ p XOR r

(p, q, r) ↦ (p + r) mod 2

linear | none | linear

Rule 90 is an additive rule.

Rule 90 is left-right symmetric.

The generating function for rule 90 is 1/(1 - (x + 1/x) y) (mod 2).

Rule 90 is a class 3 rule from random initial conditions.

Rule 90 is an outer totalistic rule, corresponding to outer totalistic code 12.

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