Tnosed p4
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Tnosed p4  
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Pattern type  Oscillator  

Oscillator type  Tnose  
Number of cells  31  
Bounding box  11×12  
Period  4  
Mod  4  
Heat  15  
Volatility  0.55  
Strict volatility  0.49  
Discovered by  Robert Wainwright  
Year of discovery  1989  
 
 
 

Tnosed p4 is a period 4 oscillator that was found in October 1989 by Robert Wainwright. It can be used as a filter that deletes every other lightweight spaceship in a stream of period 4n + 2.^{[1]}
A variant based on the overweight emulator is shown below.
(click above to open LifeViewer) RLE: here Plaintext: here 
See also
References
External links
 Tnosed p4 at the Life Lexicon
 Tnosed p4 at Adam P. Goucher's Catagolue
 31P4.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
 Patterns
 Oscillators with 31 cells
 Patterns with 31 cells
 Patterns found by Robert Wainwright
 Patterns found in 1989
 Patterns that can be constructed with 56 gliders
 Oscillators
 Periodic objects with minimum population 31
 Tnoses
 Oscillators with period 4
 Oscillators with mod 4
 Oscillators with heat 15
 Oscillators with volatility 0.55
 Oscillators with strict volatility 0.49
 Patterns with bilateral orthogonal symmetry
 Sparkers
 Sparkers with period 4
 Weak sparkers