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 A365650 #11 Nov 04 2023 18:24:35 %S A365650 1,4,36,660,16687 %N A365650 Number of free n-polyominoids, allowing both corner- and edge-connections. %C A365650 These structures could be called polypletoids (or pseudo-polyominoids), because they are related to polyplets (polyominoids) as polyominoids (pseudo-polyominoes) are related to polyominoes. %H A365650 Pontus von Brömssen, <a href="/A365650/a365650.svg">Illustration for sizes 1..3</a>. %H A365650 <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>. %Y A365650 Cf. A000105 (polyominoes), A030222 (polyplets), A075679 (polyominoids), A365651 (fixed), A365652 (corner-connections only). %Y A365650 30th row of A366766. %K A365650 nonn,hard,more %O A365650 1,2 %A A365650 _Pontus von Brömssen_, Sep 17 2023