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 A383808 #11 May 12 2025 14:35:29 %S A383808 1,1,3,8,25,72,234,701,2119,5872,14772,31331,53512,68794,66816,49714, %T A383808 29706,14235,5679,1770,469,87,16,1,1 %N A383808 Number of polyforms with n cells on the faces of a pentagonal icositetrahedron up to rotation. %C A383808 These are "one-sided" polyforms. %C A383808 The pentagonal icositetrahedron is the polyhedral dual of the snub cube. %H A383808 Peter Kagey, <a href="/A383808/a383808.pdf">Illustration of a(4)=25</a>. %H A383808 Wikipedia, <a href="https://en.wikipedia.org/wiki/Pentagonal_icositetrahedron">Pentagonal icositetrahedron</a> %Y A383808 Tetrahedral symmetry: A383826. %Y A383808 Octahedral symmetry: A383799 (row 3), A383801, A383803, A383805, A383807, A383808. %Y A383808 Icosahedral symmetry: A030137, A030138, A383491, A383493, A383495, A383497, A383498, A383786. %Y A383808 Cf. A197159 (floret pentagonal). %K A383808 nonn,full,fini %O A383808 0,3 %A A383808 _Peter Kagey_, May 11 2025