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|Oscillator type||Billiard table|
|Number of cells||25|
|Discovered by||Dean Hickerson|
|Year of discovery||1989|
1-2-3-4 is a period-4 oscillator and billiard table configuration found by Dean Hickerson in August 1989. A 24-glider synthesis is known for a stator variant of this oscillator in which the bottom edge is stabilized by a tub, while a 27-glider synthesis was found for the canonical version by Martin Grant in May 2021.
- 25P4.4 at Heinrich Koenig's Game of Life Object Catalogs