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 A366341 #15 Dec 04 2023 12:32:13 %S A366341 4,24,200,1924,20228,225788,2631672 %N A366341 Number of fixed (4,3)-polyominoids with n cells, allowing right-angled (or hard) connections only. %C A366341 Two cubes sharing a face have a right-angled connection if they do not lie in the same 3-dimensional affine subspace. %C A366341 Connections that are not right-angled (flat connections) may occur, but the polyominoids considered here must be connected through right-angled connections only. %C A366341 Also, number of fixed polysticks in 4 dimensions with right-angled connections. %H A366341 Wikipedia, <a href="https://en.wikipedia.org/wiki/Polyominoid">Polyominoid</a>. %H A366341 <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>. %Y A366341 Cf. A075678, A365655, A366337, A366339, A366340 (free). %Y A366341 41st and 77th row of A366767. %K A366341 nonn,hard,more %O A366341 1,1 %A A366341 _Pontus von Brömssen_, Oct 07 2023