Beluchenko's p40 is a period-40 oscillator discovered by Nicolay Beluchenko on March 4, 2009. In terms of its 26 cells, it is the smallest known period 40 oscillator. Blocks can be shared: the same block can be hassled with two copies of the oscillator at a displacement of half the period (or other nearby timings). The shared block is hassled with a displacement of one period.
This oscillator first appeared semi-naturally in April 2016.
- 26P40.1 at Heinrich Koenig's Game of Life Object Catalogs