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 A089846 #6 Mar 31 2012 14:02:17 %S A089846 1,1,2,5,13,35,100,296,903,2857,9274,30852,104784,362108,1269324, %T A089846 4502624,16130539,58271303,212001890,776027286,2855731796 %N A089846 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089867/A089868. %C A089846 The number of orbits to which the corresponding automorphism(s) partitions the set of A000108(n) binary trees with n internal nodes. %H A089846 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A089846 nonn %O A089846 0,3 %A A089846 _Antti Karttunen_, Dec 20 2003