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 A054962 #28 May 29 2018 21:49:28 %S A054962 1,1,1,1,1,13,120,1680,4200,181440 %N A054962 Number of different solutions to problem in A054961. %D A054962 Initial terms computed by Michael B. Greenwald (mbgreen(AT)central.cis.upenn.edu), May 24 2000. %Y A054962 Cf. A304041. %K A054962 nonn,hard,nice,more %O A054962 0,6 %A A054962 _N. J. A. Sloane_, May 24 2000 %E A054962 a(8) from _Giovanni Resta_, Mar 30 2006 %E A054962 a(9) from _Zhao Hui Du_, Mar 29 2018