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 A133169 #8 Feb 28 2020 04:38:54 %S A133169 0,0,0,1,0,2,1,9,7,40,63,401,1202,6503,31505,187643,1137602,7617639, %T A133169 53688610 %N A133169 Transposition classes of Latin trades of size n. %H A133169 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 A133169 Cf. A007083. %K A133169 nonn,more %O A133169 1,6 %A A133169 _Ian Wanless_, Oct 11 2007