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 A384069 #15 May 21 2025 01:24:43 %S A384069 1,2,2,5,12,26,52,76,83,61,39,16,7,2,1 %N A384069 Number of connected components of n faces of the truncated octahedron up to the 48 rotations and reflections of the truncated octahedron. %C A384069 Two faces are connected if they share an edge. %C A384069 These are "free" polyforms because both rotations and reflections are allowed. %C A384069 The truncated octahedron is the polyhedral dual of the tetrakis hexahedron. %H A384069 Peter Kagey, <a href="/A384069/a384069.pdf">Illustration of a(1)-a(3)</a>. %H A384069 Wikipedia, <a href="https://en.wikipedia.org/wiki/Truncated_octahedron">Truncated octahedron</a> %e A384069 a(1) = 2 because the truncated octahedron is not face-transitive but has two distinct types of faces: square faces and hexagonal faces. %Y A384069 Cf. A383802 (tetrakis hexahedron). %Y A384069 Cf. A384067 (cuboctahedron), A384068 (truncated cube), A384069 (truncated octahedron), A384070 (rhombicuboctahedron), A384071 (truncated cuboctahedron), A384072 (snub cube). %K A384069 nonn,fini,full %O A384069 0,2 %A A384069 _Peter Kagey_, May 18 2025