Fibonacci sequence



  • The sequence of integers, each of which is the sum of the preceding two, the first and second numbers both being 1.
  • Any sequence of numbers such that each is the sum of the preceding two.


  • Named after the Italian mathematician later known as Fibonacci (c.1175 – c.1250), who introduced the sequence to a European readership in his 1202 book Liber Abaci.

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