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 A366335 #13 Jul 05 2025 14:43:36 %S A366335 6,60,916,16698,336210,7218768,162185112,3769221330,89924613880 %N A366335 Number of fixed (4,2)-polyominoids with n cells. %C A366335 A (D,d)-polyominoid is a connected set of d-dimensional unit cubes with integer coordinates in D-dimensional space, where two cubes are connected if they share a (d-1)-dimensional facet. For example, (3,2)-polyominoids are normal polyominoids (A075678), (D,D)-polyominoids are D-dimensional polyominoes (A001168, A001931, A151830, ...), and (D,1)-polyominoids are polysticks in D dimensions (A096267, A365560, A365562, ...). %H A366335 Wikipedia, <a href="https://en.wikipedia.org/wiki/Polyominoid">Polyominoid</a>. %H A366335 <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>. %Y A366335 Cf. A366334 (free). %Y A366335 46th row of A366767. %Y A366335 Fixed (D,d)-polyominoids: %Y A366335 D\d| 1 2 3 4 %Y A366335 ---+-------------------------------- %Y A366335 1 | A000012 %Y A366335 2 | A096267 A001168 %Y A366335 3 | A365560 A075678 A001931 %Y A366335 4 | A365562 A366335 A366337 A151830 %K A366335 nonn,hard,more %O A366335 1,1 %A A366335 _Pontus von Brömssen_, Oct 07 2023 %E A366335 a(7)-a(9) from _John Mason_, Jul 05 2025