Octagon 2
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Octagon 2  
View animated image  
View static image  
Pattern type  Oscillator  

Number of cells  16  
Bounding box  8×8  
Frequency class  29.3  
Period  5  
Mod  5  
Heat  16  
Volatility  0.80  
Strict volatility  0.80  
Discovered by  Arthur Taber Sol Goodman  
Year of discovery  1971  
 
 
 

Octagon 2 was the first known period5 oscillator, discovered in 1971 independently by Sol Goodman and Arthur Taber; the name is due to the latter. Its discovery was first reported in Lifeline Volume 1.
Commonness
Octagon 2 is about the twentysixth most common naturallyoccurring oscillator in Achim Flammenkamp's census, being about as common as unix.^{[1]} On Catagolue, it is the most common period 5 oscillator, being more common than fumarole.^{[2]}
See also
References
 ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
 ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
External links
 Octagon 2 at the Life Lexicon
 16P5.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
 Patterns
 Patterns with Catagolue frequency class 29.3
 Natural periodic objects
 Oscillators with 16 cells
 Patterns with 16 cells
 Patterns found by Arthur Taber
 Patterns found by Sol Goodman
 Patterns found in 1971
 Patterns that can be constructed with 6 gliders
 Oscillators
 Periodic objects with minimum population 16
 Oscillators with period 5
 Oscillators with mod 5
 Oscillators with heat 16
 Oscillators with volatility 0.80
 Oscillators with strict volatility 0.80
 Patterns with complete square symmetry
 Sparkers
 Sparkers with period 5
 Weak sparkers