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 A354306 #7 Apr 26 2023 07:06:14 %S A354306 1,2,7,62,459,4040,35386,321639,2958100,27585931,259670736 %N A354306 Number of one-sided polypentagrams with n cells. %C A354306 Polypentagrams are defined in A211179. "One-sided" means that mirror images are considered distinct. %H A354306 George Sicherman, <a href="https://sicherman.net/polypgrams/">Catalogue of Polypentagrams</a> %Y A354306 Cf. A211179, A103465, A000105, A000988. %K A354306 nonn,hard,more %O A354306 1,2 %A A354306 _Aaron N. Siegel_, May 23 2022