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 A219892 #10 Feb 06 2022 15:00:48 %S A219892 1,4,624,1104045,2983458766,10922621656743 %N A219892 Number of directed 5-regular graphs on n nodes. %H A219892 Gunnar Brinkmann, <a href="https://doi.org/10.1016/j.disc.2012.09.014">Generating regular directed graphs</a>, Discrete Math., 313 (2012), 1-7. %Y A219892 Column k=5 of A350910. %Y A219892 Cf. A096368, A219889, A219890, A219891, A219893. %K A219892 nonn,more %O A219892 6,2 %A A219892 _N. J. A. Sloane_, Nov 30 2012