This week's featured article

Pentadecathlon is a period 15 oscillator that was found in 1970 by John Conway while tracking the history of short rows of cells (see one cell thick pattern). Indeed, 10 cells placed in a row quickly evolve into this object, which is the most natural oscillator of period greater than 3. In fact, it is the fifth or sixth most common oscillator overall, being about as frequent as the clock, but much less frequent than the blinker, toad, beacon or pulsar. It is the only known oscillator that is a polyomino in more than one phase (besides the blinker).

Pattern collection

The LifeWiki contains one of the most comprehensive catalogues of patterns available on the internet. Within it you will find:


Did you know...

 ...that there are 24,619,307 strict still lifes with population 26?
 ...that there are 60,823,008 strict still lifes with population 27?
 ...that there are 150,613,157 strict still lifes with population 28?
 ...that there are 373,188,952 strict still lifes with population 29?
 ...that there are 926,068,847 strict still lifes with population 30?
 ... that an Nbit strict still life  specifically, some length of long long (...) boat or barge  can be constructed for any odd integer N using no more than 39 gliders, and for any even integer N using no more than 38 gliders, using a temporary tubstretcher?
 ... that an Nbit period2 oscillator can be constructed for any odd integer N using no more than 45 gliders, and for any even integer N using no more than 46 gliders, using a temporary tubstretcher?
 ...that there are 2,299,616,637 strict still lifes with population 31?
 ...that there are 5,716,948,683 strict still lifes with population 32?
 ...that there are currently known elementary spaceships with speeds c/7 and c/10 orthogonal, but none with c/8 or c/9?

