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 A089419 #5 Mar 31 2012 14:02:17 %S A089419 1,1,2,4,4,13,34,84,116,382,1384,1984,2498,7102,11944,22276,65242, %T A089419 105118,186574,414001,888856 %N A089419 Maximum cycle size in range [A014137(n-1)..A014138(n-1)] of permutation A082333/A082334. %H A089419 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A089419 nonn %O A089419 0,3 %A A089419 _Antti Karttunen_, Nov 29 2003