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 A089427 #5 Mar 31 2012 14:02:17 %S A089427 1,1,1,3,4,18,33,161,433,1705,10789,29157,88720,490289,1881309, %T A089427 4731356,17455195,36595263,178053588,405917904,3256229459 %N A089427 Maximum cycle size in range [A014137(n-1)..A014138(n-1)] of permutation A082355/A082356. %H A089427 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A089427 nonn %O A089427 0,4 %A A089427 _Antti Karttunen_, Nov 29 2003