I was reading Anneli Lax's excellent monograph on Linear Algebra and she refers to learning methods to yield $f_n$ (the $n^{th}$ Fibonacci number) directly (without first calculating $f_i \forall i<n$).
She says that this was also done by Paul Garrett (a high school student then) in his paper Matrix Eigenvalues: Characteristic Values in the May 1971 issue of The Mathematics Student Journal.
I believe this journal was published by the NCTM in the US. But I am not able to find it (perhaps I am not looking well enough on JSTOR). Do you know if this journal was discontinued or replaced by some other journal? Are its archives available somewhere?
PS: Was it the same Paul Garrett?