Sequences, Sums & Series
 In the Wolfram Language, integer sequences are represented by lists.
 Use Table to define a simple sequence:
 
  
  
   | Out[1]= |   | 
  
  
 Some well-known sequences are built in:
 
  
  
   | Out[2]= |   | 
  
  
 
   
  Define a recursive sequence using RecurrenceTable:
  (Note the use of {x,min,max} notation.)
  
   
   
    | Out[1]= |   | 
   
   
  Compute the Total of the sequence:
  
   
   
    | Out[2]= |   | 
   
   
  
 
   
  
   Compute the Sum of a sequence from its generating function:
   
  
  
   Use ESCsumtESC for a fillable typeset form:
   
  
  
   You can do indefinite and multiple sums:
   
  
  
 
 
   
  
   Generate power series approximations to virtually any combination of built-in functions:
   
  
  
   O[x]9 represents higher-order terms that have been omitted; use Normal to truncate this term:
   
  
  
   Given an unknown or undefined function, Series returns a power series in terms of derivatives: