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 A089413 #6 Mar 31 2012 14:02:17 %S A089413 1,1,1,2,2,4,4,5,5,11,11,17,11,21,17,30,22,52,24,74,36 %N A089413 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A071655/A071656. %C A089413 The number of orbits to which the corresponding automorphism(s) partitions the set of A000108(n) binary trees with n internal nodes. %H A089413 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %Y A089413 Bisections: A089409, A089416. Cf. A089411. %K A089413 nonn %O A089413 0,4 %A A089413 _Antti Karttunen_, Nov 29 2003