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 A365996 #10 Dec 04 2023 16:44:19 %S A365996 3,18,182,2211,29787,427249 %N A365996 Number of fixed polyominoids with n cells, allowing flat corner-connections and right-angled edge-connections. %C A365996 See A365995 for further details and a table of related sequences. %H A365996 Wikipedia, <a href="https://en.wikipedia.org/wiki/Polyominoid">Polyominoid</a>. %H A365996 <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>. %Y A365996 Cf. A365995 (free). %Y A365996 21st row of A366767. %K A365996 nonn,hard,more %O A365996 1,1 %A A365996 _Pontus von Brömssen_, Sep 26 2023