26.1 From Functions to Sequences: Numbers in Order
Point 5 of 6
26.1.5 Recurrence Relations
Core idea
Instead of naming values outright, just say how the next term comes from the one before, as aₙ₊₁=f(aₙ)
Module goal. Narrow the functions you already know down to whole-number inputs only, and build the basic language of sequences, general terms, and recurrence.
eastmath.com · 26.1 From Functions to Sequences: Numbers in Order · 26.1.5 Recurrence Relations