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 A090828 #6 Mar 31 2012 14:02:18 %S A090828 1,1,2,3,7,14,37,95,285,876,2862,9582,33022,115454,409721,1467781, %T A090828 5305211,19302774,70662612,259980148,960908596 %N A090828 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A085163/A085164. %C A090828 The number of orbits to which the corresponding automorphism(s) partitions the set of A000108(n) binary trees with n internal nodes. %H A090828 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a> %K A090828 nonn %O A090828 0,3 %A A090828 _Antti Karttunen_, Dec 20 2003