Achim's p4
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Achim's p4  
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Pattern type  Oscillator  

Number of cells  40  
Bounding box  11×9  
Period  4  
Mod  4  
Heat  4  
Volatility  0.17  
Discovered by  Achim Flammenkamp  
Year of discovery  1994  
 
 

 For other uses of "cloverleaf", see Cloverleaf (disambiguation).
Achim's p4 (or cloverleaf) is a period 4 oscillator that was found in a less compact form (using two sombreros) by David Buckingham in 1976. The form shown here was found by Achim Flammenkamp in 1988. The rotor is two copies of the rotor of 1234, so the oscillator is sometimes called the dual 1234.
Commonness
Achim's p4 is about the twentythird most common naturallyoccurring oscillator in Achim Flammenkamp's census.^{[1]}
Synthesis
In October, 2010 Lewis Patterson found a predecessor of this oscillator that allows a 7glider synthesis.
Image gallery
See also
References
 ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
External links
 Achim's p4 at Eric Weisstein's Treasure Trove of Life
 Achim's p4 at the Life Lexicon
 Cloverleaf at Adam P. Goucher's Catagolue
Categories:
 Patterns that can be constructed with 7 gliders
 Patterns
 Oscillators
 Patterns with 40 cells
 Oscillators with 40 cells
 Oscillators with period 4
 Oscillators with mod 4
 Oscillators with heat 4
 Oscillators with volatility 0.17
 Patterns found by Achim Flammenkamp
 Patterns found in 1994
 Patterns with rectangular orthogonal symmetry