The formula calculates the sum of a range of Fibonacci numbers. F(n) = F(n-1) + F(n-2), with F(0) = 0 and F(1) = 1. F(n) = F(1) + F(2) + ... + F(n-1) with F(0) = 0 and F(1) = 1.
Rules for Fibonacci Numbers\n\n Fibonacci sequence numbers follow a rule according to which, Fn = Fn-1 + Fn-2, where n > 1. The third Fibonacci number is given as F2 = F1 + F0. As we know, F0 = 0 and F1 = 1, the value of F2 = 0 + 1 = 1.