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 A089876 #6 Mar 31 2012 14:02:17 %S A089876 1,1,1,2,3,14,22,62,127,320,756,1888,4440,10996,26784,67004,166449, %T A089876 417848,1041262,2596506,6427116 %N A089876 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A071667/A071668. %C A089876 The number of orbits to which the corresponding automorphism(s) partitions the set of A000108(n) binary trees with n internal nodes. %H A089876 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A089876 nonn %O A089876 0,4 %A A089876 _Antti Karttunen_, Nov 29 2003