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 A074653 #5 Mar 30 2012 17:37:12
%S A074653 120,56640,56055960,76385030400,124672148625000,228479027903507520,
%T A074653 453922725503344566840,957089306644111555200000,
%U A074653 2112293133628003412534448000,4833477575790121928875488600000
%N A074653 1/n * sum over d|n of {mu(n/d) * (5d)! / d!^5}.
%H A074653 <a href="/index/Lu#Lyndon">Index entries for sequences related to Lyndon words</a>
%Y A074653 Inverse Witt transform of A006176. a(n) = A074657(n)*5.
%K A074653 nonn
%O A074653 1,1
%A A074653 _Christian G. Bower_, Aug 28 2002