Beyond language barrier dots sigil

[D.G.]

Gödel, Escher, Bach: An Eternal Golden Braid, Douglas R. Hofstadter to you.
He has also written other books.

Right, a good book that covers lots of important topics, I didn't read his new one yet.

9518 135519 356.

Here's something a little less tedious than the sequences thing but in the same artery:

[D.G.]

One for the second number sigil


and its three sequences.