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 A354307 #9 Apr 26 2023 07:06:28 %S A354307 2,10,70,550,4590,39774,353860,3210940,29581000,275808700,2596707296 %N A354307 Number of fixed polypentagrams with n cells. %H A354307 George Sicherman, <a href="https://sicherman.net/polypgrams/">Catalogue of Polypentagrams</a> %Y A354307 Cf. A211179, A354306. %K A354307 nonn,more,hard %O A354307 1,1 %A A354307 _Aaron N. Siegel_, May 23 2022