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 A383804 #10 May 11 2025 09:24:39 %S A383804 1,1,2,4,10,23,65,166,453,1157,2849,6252,11894,18183,21614,19139, %T A383804 12966,6691,2813,901,253,49,11,1,1 %N A383804 Number of polyforms with n cells on the faces of a deltoidal icositetrahedron up to rotation and reflection. %C A383804 These are "free" polyforms. %C A383804 The deltoidal icositetrahedron is the polyhedral dual of the rhombicuboctahedron. %H A383804 Peter Kagey, <a href="/A383804/a383804.pdf">Illustration of a(5)=23</a>. %H A383804 Wikipedia, <a href="https://en.wikipedia.org/wiki/Deltoidal_icositetrahedron">Deltoidal icositetrahedron</a> %Y A383804 Cf. A383805 (one-sided). %Y A383804 Octahedral symmetry: A333333 (row 3), A383800, A383802, A383804, A383806. %Y A383804 Icosahedral symmetry: A030135, A030136, A340635, A383490, A383492, A383494, A383496. %K A383804 nonn,fini,full %O A383804 0,3 %A A383804 _Peter Kagey_, May 10 2025