Life Period-3 Pseudo-Oscillators

Size in bits: 17 | 18 | 19 | 20 | 21 | 22 | 24
Cost in gliders: >1 glider/bit | unknown



The 2 seventeen-bit period 3 pseudo-oscillators

17-bit pseudo-P3

Block on jam [8] Block beside jam [8]


The 5 eighteen-bit period 3 pseudo-oscillators

18-bit period 3 pseudo-oscillators

Up boat on jam [8] Down boat on jam [10] Down boat beside jam [10] Up boat beside jam [8] Block on eater eating eater [10]


The 20 nineteen-bit period 3 pseudo-oscillators

19-bit period 3 pseudo-oscillators

Up ship above jam [10] Up cis carrier above jam [12] beehive above jam [9] Down ship above jam [11] Up snake above jam [12] Down snake above jam [12] Up trans carrier above jam [12] Down trans carrier above jam [12] Up ship beside jam [10] beehive beside jam [9]
Up cis carrier beside jam [12] Down ship beside jam [11] Up snake beside jam [12] Down snake beside jam [12] Up trans carrier beside jam [12] Down cis carrier above jam [12] Down trans carrier beside jam [12] Down cis carrier beside jam [12] Down boat on eater eating eater [11] Up boat on eater eating eater [9]


The 44 twenty-bit period 3 pseudo-oscillators

20-bit period 3 pseudo-oscillators


The 90 21-bit period 3 pseudo-oscillators

21-bit period 3 pseudo-oscillators


The 265 22-bit period 3 pseudo-oscillators

Unfortunately, due to time limitations, these cannot yet be shown. These consist of:

Most of these are easy to synthesize using standard techniques, although ten are based on predecessors that do not yet have syntheses.


1 24-bit period 3 pseudo-oscillator

24b PP3

Up cis caterer below caterer [22]



The 4 period 3 pseudo-oscillators up to 21 bits costing >1 glider/bit

gt. 1 glider/bit pseudo-P3

Block on skewed pole on key [35] Block on skewed pole on bent key [35] Block below skewed pole on key [30] Block below skewed pole on bent key [30]


The 158 period 3 pseudo-oscillators up to 25 bits without any known syntheses

Unfortunately, due to time limitations, these cannot yet be shown. Most consist of a small still-life on as as-yet-unsynthesized period-3 oscillator. There are also a few consisting of two oscillators (caterer and/or jam) with adjacent rotors.

There are 2 22-bit ones:

There are 8 23-bit ones:

There are 45 24-bit ones:

There are 103 25-bit ones:



Related: period-3 oscillators.

Other pseudo-oscillators by period: 2, 3, 4, 5, 6, 8, 10, 12, 15, 30, 60, other.

Other types: still-lifes, pseudo-still-lifes, oscillators, pseudo-oscillators, oscillators by period, pseudo-oscillators by period, guns, multi-colored Life, basic spaceships and pseudo-spaceships, exotic spaceships, spaceships flotillae, puffers, constellations, methuselahs, not quite stable objects.

See also: Life objects sorted by: counts, frequency of occurrence, cost in gliders, name, size in bits, or type.

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Copyright © 1997, 1998, 1999, 2013, 2014 by Mark. D. Niemiec. All rights reserved.
This page was last updated on 2015-02-19.