of troy, since you can remember it's called the Fibonacci Sequence (which I only remember when you point it out - passive, not active) don't give me that about your lack of maths!!
I wasn't aware of a Greek letter for the 'final value' this ratio tends to, but a quick google shows it is phi, and also that:
The golden ratio [approximately] 1·618034 is also called the golden section or the golden mean or just the golden number. It is often represented by a greek letter Phi . The closely related value which we write as phi with a small "p" is just the decimal part of Phi, namely 0·618034

...why, as a native NY'er, are you talking about Alevel maths, which is a British qualification?