- This article is about the 22-cell period-36 oscillator. For the 36-cell period-22 oscillator (36P22), see Jason's p22.
22P36 is an unnamed period-36 oscillator found by Noam Elkies on January 29, 1995. It consists of two traffic lights (or two phi sparks in some phases) being hassled by two eater 1s. In terms of population it is currently the smallest period 36 oscillator, and in fact, the smallest oscillator with period 36 or above.
It first appeared semi-naturally in July or August 2017, in a symmetric soup submitted to Catagolue by Moth Wingthane. Since then, about 1 in 5 billion soups with the correct rotational symmetry form a 22P36, including those where an integral or other similar object replaces each fishhook.
On December 15, 2021, based on cvojan's observation that a single traffic light can be similarly hassled at other periods, 83bismuth38 constructed a monomer of this oscillator with 104P9.
On August 24, 2023, Carson Cheng reduced the synthesis cost from 9 gliders to 8 gliders.