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 A133175 #7 Feb 28 2020 05:34:02 %S A133175 0,0,0,1,0,2,1,9,7,40,63,401,1202,6503,31512,187798,1138317,7625934, %T A133175 53764585 %N A133175 Transposition classes of ordered Latin bi-trades of size n. %H A133175 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 A133175 Cf. A007083. %K A133175 nonn,more %O A133175 1,6 %A A133175 _Ian Wanless_, Oct 11 2007