Reminds me of the Online Encyclopedia of Integer Sequences https://oeis.org/ https://oeis.org/ But I was somewhat surprised when my first click in this encyclo

Reminds me of the Online Encyclopedia of Integer Sequences https://oeis.org/ https://oeis.org/ But I was somewhat surprised when my first click in this encyclopedia of 2d curves landed me on a 3d sponge https://www.2dcurves.com/3d/3dm.html https://www.2dcurves.com/3d/3dm.html