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 A133173 #7 Feb 28 2020 05:33:45 %S A133173 0,0,0,1,0,1,1,5,4,19,26,163,445,2302,10798,63690,381883,2550827, %T A133173 17945643 %N A133173 Species of ordered Latin bi-trades of size n. %H A133173 I. M. Wanless, <a href="https://ajc.maths.uq.edu.au/pdf/39/ajc_v39_p247.pdf">A computer enumeration of small latin trades</a>, Australas. J. Combin. 39, (2007) 247-258. %Y A133173 Cf. A007083. %K A133173 nonn,more %O A133173 1,8 %A A133173 _Ian Wanless_, Oct 11 2007