A puzzle
I have another idea for a longer proof-post with nice pictures, but it’s going to take a bit of time to prepare. Meanwhile, here’s a quick and dirty puzzle.
A sequence begins as follows:
1
11
21
1211
111221
What’s the pattern here? Finding it takes cleverness, but absolutely no sophisticated math.
Below this heart-melting video of Bill Evans’ trio in 1970, I’ll put down one more term as a big extra hint.
Highlight this decoy list of numbers to see the hint (this won’t work on your dashboard): 121313231221122321