Fibonacci Numbers Generator

Fibonacci Numbers Generator computes nth Fibonacci number for a given integer n. Fibonacci numbers is a sequence F_n of integer numbers defined by the recurrence relation shown on the image below. Ratio of the two consequitive fibonacci numbers is the closest rational approximation of the golden ratio. Fibonacci numbers often occur in nature, e.g. in branching of a tree, arrangements of leaves on a stem, number of petals on a flower.

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