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
 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