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 A074657 #8 Aug 24 2015 14:18:02
%S A074657 1,24,11328,11211192,15277006080,24934429725000,45695805580701504,
%T A074657 90784545100668913368,191417861328822311040000,
%U A074657 422458626725600682506889600,966695515158024385775097720000,2277925055026596846727033776223416,5499697195473757755136472944165075200
%N A074657 Number of Lyndon words (aperiodic necklaces) with 5n beads of 5 colors, n beads of each color.
%H A074657 <a href="/index/Lu#Lyndon">Index entries for sequences related to Lyndon words</a>
%F A074657 1/(5n) * sum over d|n of {mu(n/d) * (5d)! / d!^5}.
%Y A074657 a(n) = A074653(n)/5. a(n)=A074654(n)*24.
%K A074657 nonn
%O A074657 0,2
%A A074657 _Christian G. Bower_, Aug 29 2002
%E A074657 a(0)=1 prepended by _Alois P. Heinz_, Aug 24 2015