The Fibonacci series is a sequence of numbers starting with 0, 1 and where each subsequent number is the sum of the previous two:

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ...

Thanks to Binet’s Fibonacci number formula, I didn’t have to use a Repeat node 😉

Binet_Fibonacci_Number_Formula.xsicompound