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 A074652 #5 Mar 30 2012 17:37:12
%S A074652 24,1248,123192,15765120,2346549000,384790520160,67502621079768,
%T A074652 12445136548416000,2383639140696105600,470536087106183748000,
%U A074652 95188348079916284698296,19650775121845025331180672
%N A074652 1/n * sum over d|n of {mu(n/d) * (4d)! / d!^4}.
%H A074652 <a href="/index/Lu#Lyndon">Index entries for sequences related to Lyndon words</a>
%Y A074652 Inverse Witt transform of A006175. a(n) = A029809(n)*24. a(n) = A074656(n)*4.
%K A074652 nonn
%O A074652 1,1
%A A074652 _Christian G. Bower_, Aug 28 2002