Many thanks. As a non-mathematician, I'll have to spend some time poring over your wonderful article. I'm currently working on an article about recursion in country music (using the same Droste Cacao box illustration!), and I'll provide a link when it's published. In the meantime, here's a Swede pop song about the LSE: https://youtu.be/SXLoyN-_b8g

It's not recursive, but it is reflective.