Hyperbolic Ball packings from Coxeter groups!
These two packings are the same, generated from the same Coxeter group:
\[ \begin{pmatrix}1&3&3&4&3\\3&1&3&4&4\\3&3&1&2&3\\4&4&2&1&3\\3&4&3&3&1\end{pmatrix} \]
The first image is 2D: it draws a plane slice of the 3D ball packing in the second image.
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