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 A057996 #20 Feb 11 2020 00:42:21 %S A057996 0,1,1,1,2,4,35,556,64065 %N A057996 Number of self-converse loops (quasigroups with an identity element) of order n. %C A057996 x*y is isomorphic to y*x. %H A057996 <a href="/index/Qua#quasigroups">Index entries for sequences related to quasigroups</a> %Y A057996 Cf. A057991, A057992, A057993, A057994, A057771, A057998. %K A057996 nonn,more,nice %O A057996 0,5 %A A057996 _Christian G. Bower_, Nov 01 2000 %E A057996 a(8) from Juergen Buntrock (jubu(AT)eule.in-berlin.de), Nov 17 2003 %E A057996 Offset corrected and a(0) prepended by _Jianing Song_, Oct 26 2019