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 A246988 #7 Mar 26 2023 15:55:40 %S A246988 1,4,12,25,50,91,164 %N A246988 Number of isomorphism classes of oriented matroids of dimension n and cardinality n+3. %H A246988 Lukas Finschi, <a href="https://finschi.com/math/om/">Homepage of Oriented Matroids</a> %Y A246988 A diagonal of A063804. %K A246988 nonn,more %O A246988 1,2 %A A246988 _N. J. A. Sloane_, Sep 17 2014 %E A246988 a(4) corrected by _Andrey Zabolotskiy_, Mar 26 2023