OEIS A000360: Distribution of non-empty triangles inside a fractal rep 4 tile
Manage episode 508602575 series 3690682
Join us as we explore A000360, the OEIS entry counting non-degenerate triangles inside a self-similar fractal rep-4 tile. We’ll break down the geometry of the fractal and what counts as a triangle, then uncover the surprising number-theoretic connections: the distribution ties to the Stern–Brocot sequence (A02487) via a modulo-3 reduction, with dropping the first term yielding AA00360. We’ll also discuss the tidy recurrence governing even-index terms, revealing a hidden arithmetic order behind a visually intricate fractal.
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