Why not
From LifeWiki
Why not  
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Pattern type  Oscillator  

Family  Griddle  
Number of cells  14  
Bounding box  7×7  
Frequency class  39.9  
Period  2  
Mod  2  
Heat  15  
Volatility  0.68  
Strict volatility  0.68  
Discovered by  David Buckingham  
Year of discovery  1977  
 
 
 

Why not is a period 2 oscillator that was found by David Buckingham in July 1977 that is extremely similar to by flops; in fact, in one of its phases it differs by only one cell.
External links
 Why not at the Life Lexicon
 14P2.20 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
 Patterns
 Patterns with Catagolue frequency class 39.9
 Natural periodic objects
 Oscillators with 14 cells
 Patterns with 14 cells
 Patterns found by David Buckingham
 Patterns found in 1977
 Patterns that can be constructed with 7 gliders
 Oscillators
 Periodic objects with minimum population 14
 Griddle variants
 Oscillators with period 2
 Oscillators with mod 2
 Oscillators with heat 15
 Oscillators with volatility 0.68
 Oscillators with strict volatility 0.68
 Patterns with bilateral orthogonal symmetry