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 A383490 #21 May 23 2025 10:13:14 %S A383490 1,1,1,3,4,12,24,65,156,422,1057,2708,6574,15399,33438,66787,118242, %T A383490 180602,227896,226652,169294,97224,44324,16416,5005,1247,261,46,8,1,1 %N A383490 Number of polyforms with n cells on the faces of a rhombic triacontahedron up to rotation and reflection. %C A383490 These are "free" polyforms. %C A383490 The rhombic triacontahedron is the polyhedral dual of the icosidodecahedron. %C A383490 Also the number of free polyedges of the dodecahedron. %H A383490 Wikipedia, <a href="https://en.wikipedia.org/wiki/Rhombic_triacontahedron">Rhombic triacontahedron</a> %Y A383490 Cf. A383491 (one-sided). %Y A383490 Cf. A030135 (dodecahedron), A030136 (icosahedron), A340635 (deltoidal hexecontahedron), A383492 (triakis icosahedron), A383494 (pentakis dodecahedron), A383496 (disdyakis triacontahedron). %Y A383490 Cf. A383974. %K A383490 nonn,fini,full %O A383490 0,4 %A A383490 _Peter Kagey_, Apr 28 2025 %E A383490 a(14)-a(30) from _Pontus von Brömssen_, May 23 2025