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Some Special Leonhard Euler’s Series and Formulas
(1707-1783)
 
 
 

  • Every even integer ( ) is the sum of two odd primes.

 

  • Every odd integer ( ) is the sum of three odd primes.

 

 

 

 

 

 

 

 

 

 

 

 

  • (definition).

 

 

 

 

  • (Euler Sum) (Mathematical Montly, Euler also considered this sum in response to a letter from Goldbach.)

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