Fibonacci sequences

Noun

Fibonacci sequence (plural Fibonacci sequences)

1. The sequence of integers, each of which is the sum of the preceding two, the first and second numbers both being 1.
   • If the Fibonacci sequence is chosen for the quasiperiodic direction of a 1D QC,^([quasicrystal]) it may simply be called a Fibonacci phase.1999, Walter Steurer, Torsten Heibach, “3. Crystallography of Quasicrystals”, in Zbigniew M. Stadnik, editor, Physical Properties of Quasicrystals, Springer, page 60
2. Any sequence of numbers such that each is the sum of the preceding two.
   • Indeed, these pairs belong to a Fibonacci sequence of what are called Lucas numbers that begins 2, 1, 3, 4, 7, 11,...1977, Scientific American, volume 236, page 137