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 A089406 #6 Mar 31 2012 14:02:17 %S A089406 1,1,1,3,6,16,37,95,238,624,1650,4478,12356,34756,99313,288145,847366, %T A089406 2523092,7597834,23117382,71007196 %N A089406 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A082345/A082346. %C A089406 The number of orbits to which the corresponding automorphism(s) partitions the set of A000108(n) binary trees with n internal nodes. %H A089406 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A089406 nonn %O A089406 0,4 %A A089406 _Antti Karttunen_, Nov 29 2003