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 A272385 #13 Dec 13 2023 03:49:45 %S A272385 1,3,16,246,4866,115520,2873712,73884172,1941259395 %N A272385 Number of polycubes with n cells, allowing vertex connections and edge connections as well as face connections, distinguishing mirror images. %e A272385 For n=2 there are three possibilities: the two cubes share a face, or only an edge, or only a vertex. %e A272385 For n=3, there are 14 tricubes allowing vertex, edge, and face connections. Two of them have distinct mirror images, so a(3) = 16. %Y A272385 Cf. A272368 (identifying mirror images), A270862 (no vertex connections), A000162 (face connections only). %K A272385 nonn,more,nice,hard %O A272385 1,2 %A A272385 _George Sicherman_, Apr 28 2016 %E A272385 a(8) and a(9) from _Joerg Arndt_, Dec 13 2023