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 A089874 #5 Mar 31 2012 14:02:17 %S A089874 1,1,1,3,3,5,6,18,45,147,147,267,801,2538,3255,7665,29484,67644, %T A089874 164088,515592,1657785 %N A089874 Maximum cycle size in range [A014137(n-1)..A014138(n-1)] of permutation A071665/A071666. %H A089874 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A089874 nonn %O A089874 0,4 %A A089874 _Antti Karttunen_, Nov 29 2003