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 A089429 #6 Mar 31 2012 14:02:17 %S A089429 1,1,2,4,10,26,74,218,672,2134,6964,23206,78724,271014,944766,3328872, %T A089429 11838378,42441326,153236900,556746772,2034098988 %N A089429 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A082339/A082340. %C A089429 The number of orbits to which the corresponding automorphism(s) partitions the set of A000108(n) binary trees with n internal nodes. %H A089429 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A089429 nonn %O A089429 0,3 %A A089429 _Antti Karttunen_, Nov 29 2003