Cyclotruncated simplicial honeycomb
In geometry, the cyclotruncated simplicial honeycomb (or cyclotruncated n-simplex honeycomb) is a dimensional infinite series of honeycombs, based on the symmetry of the A ~ n {\displaystyle {\tilde {A}}_{n}} affine Coxeter group. It is given a Schläfli symbol t0,1{3[n+1]}, and is represented by a Coxeter-Dynkin diagram as a cyclic graph of n+1 nodes with two adjacent nodes ringed.
Source: Wikipedia — Cyclotruncated simplicial honeycomb (CC BY-SA 4.0)