Pentoad 2 is a period 5 oscillator that is shown as the second pattern in the sixth row of Jason Summers' main period 5 collection. It is extensible. The central part is the same as in pentoad.
A 16-glider synthesis was found by Jeremy Tan on March 19, 2019, which was later improved to 12 gliders by Goldtiger997.
- ↑ Jeremy Tan. Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ Goldtiger997. Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- 26P5.2 at Heinrich Koenig's Game of Life Object Catalogs