DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   N
      <mathematics, programming, jargon> A variable typically used
      to stand for a number of objects.
      Used unqualified in speech it suggests a large, undetermined
      number, e.g. "There were N bugs in that crock!", or a
      number implied by context, e.g. "Let's get pizza for N + 1".
      [Jargon File]
      (2006-04-18)