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 A133177 #9 Feb 28 2020 05:34:24 %S A133177 0,0,0,1,0,3,1,13,10,66,112,723,2283,12616,62175,372420,2269398, %T A133177 15225551,107457456 %N A133177 Isotopy classes of ordered Latin bi-trades of size n. %H A133177 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 A133177 Cf. A007083. %K A133177 nonn,more %O A133177 1,6 %A A133177 _Ian Wanless_, Oct 11 2007