The Fibonacci numbers were first described in Indian mathematics, as early as 200 BC in work by Pingala on enumerating possible patterns of Sanskrit poetry formed from syllables of two lengths. The sequence commonly starts from 0 and 1, although some authors start the sequence from 1 and 1 or sometimes (as did Fibonacci) from 1 and 2.
Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted F n. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. A tiling with squares whose side lengths are successive Fibonacci numbers: 1, 1, 2, 3, 5, 8, 13 and 21 For the chamber ensemble, see Fibonacci Sequence (ensemble).