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 A133174 #7 Feb 28 2020 05:33:53 %S A133174 0,0,0,1,0,2,1,9,5,36,42,313,685,3999,16535,100897,577324,3886229, %T A133174 26982310 %N A133174 Transposition classes of unordered Latin bi-trades of size n. %H A133174 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 A133174 Cf. A007083. %K A133174 nonn,more %O A133174 1,6 %A A133174 _Ian Wanless_, Oct 11 2007