Convention note: this legacy heatmap uses ((k−1)+c*((N−r)%N))%N+1, zero-based hover coordinates and row-major tab-separated clipboard export. These conventions differ from other orientations.
The current Explore page supplies a separate canonical study. Interactive behavior, accessibility and mobile rendering of this legacy tool have not been independently revalidated.
Play, pause, and step through k values (looping 1↔N). Canvases auto-fit your screen with crisp HiDPI rendering.
Counts of each symbol (1..N) for the current N and k. Colored bars reflect current highlight selection.