11. It is the ninth Fibonacci number and a companion Pell number. 12. Some composers have incorporated the golden ratio and Fibonacci numbers into their work. 13. Its design represents a pine cone, represented with logarithmic spirals based on Fibonacci numbers . 14. He made contributions to Narcissistic numbers and Fibonacci series devising puzzles using Fibonacci numbers . 15. It seems that Fibonacci numbers come into play when selecting the lengths of sides. 16. The number of spirals on the head of Romanesco broccoli is a Fibonacci number . 17. The multiple and the constant are always adjacent Fibonacci numbers . 18. Yuri Matiyasevich utilized a method involving Fibonacci numbers , which computably enumerable set is Diophantine. 19. For it is clearly true ( as these are Fibonacci numbers ), for we have. 20. :: I had the feeling it had something to do with Fibonacci number and fractals.
