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 A246990 #6 Feb 22 2023 12:00:33 %S A246990 1,11,55,204,705,2293,7377 %N A246990 Number of abstract order types of configurations of n points in n+3 dimensions. %H A246990 Lukas Finschi, <a href="https://finschi.com/math/om/">Homepage of Oriented Matroids</a> %Y A246990 A diagonal of A063853. %K A246990 nonn,more %O A246990 1,2 %A A246990 _N. J. A. Sloane_, Sep 17 2014