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  1. or download this
    (Series 1)
   30     29            1
  ---- + ---- + ... + ---- 
    1      2           30
  2. or download this
    (Formula for Series 1)
    (  (n+1-k)  ) 
Sum (  -------  )  for k = (1..n);
    (     k     )
  3. or download this
    (Series 2)
   29     28            1
  ---- + ---- + ... + ---- 
    1      2           29
  4. or download this
    (Series 3)
    1      2           30
  ---- + ---- + ... + ---- 
   29      28           0