TAOCP: (Harmonic+Fibonacci) Numbers

Section 1.2 is nearing its end as I just finished with 1.2.7 and 1.2.8 One could talk a lot of the Fibonacci series and of its relation to phi, but I'm sleepy and will just repeat a handy equation from the book that I didn't know: F_n = round(phi^n/sqrt(5), 0), where F_n is the nth fibonacci number and phi equals 0.5*(1+sqrt(5)), that is the golden ratio 1.618...