Three Approaches to a Sequence Problem
In mathematics we often find that a single problem may be solved by a variety of methods,
with each yielding new insights and perspective. In this note we solve a particular
problem with three different methods, finding that each method suggests the same
generalization (although for varying reasons!). These methods are not new; our goal
in collecting them here is to highlight the connections between different techniques.
The focus of our study has appeared (in slightly different forms) in the problem
sections of the American Ma