This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A384104 #14 Jun 10 2025 09:00:56 %S A384104 1,2,2,4,7,5,4,2,1 %N A384104 Number of edge-connected components of n faces of the truncated tetrahedron up to the 24 rotations and reflections of the truncated tetrahedron. %C A384104 Two faces are connected if they share an edge. %C A384104 These are "free" polyforms because both rotations and reflections are allowed. %C A384104 The truncated tetrahedron is the polyhedral dual of the triakis tetrahedron. %H A384104 Peter Kagey, <a href="/A384104/a384104.pdf">Illustration of a(1)-a(3)</a>. %H A384104 Wikipedia, <a href="https://en.wikipedia.org/wiki/Truncated_tetrahedron">Truncated tetrahedron</a> %e A384104 a(1) = 2 because the truncated tetrahedron is not face-transitive but has two distinct types of faces: triangular faces and hexagonal faces. %Y A384104 Cf. A383825 (triakis tetrahedron). %Y A384104 Cf. A384067 (cuboctahedron), A384068 (truncated cube), A384069 (truncated octahedron), A384070 (rhombicuboctahedron), A384071 (cuboctahedron), A384072 (snub cube). %K A384104 nonn,fini,full %O A384104 0,2 %A A384104 _Peter Kagey_, May 19 2025 %E A384104 Offset corrected by _Pontus von Brömssen_, Jun 10 2025