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 A195583 #16 Jun 29 2020 18:08:38 %S A195583 1,1,1,3,3,5,15,315,630,567,1134,4725,9450,26325,28665,116093250, %T A195583 116093250,7894341000,8881133625,14849255421000,4242644406000, %U A195583 3118343638410000,3811308891390000,34301780022510000,205810680135060000,1470076286679000000,2702564486622000000 %N A195583 Denominator of the average height of a binary search tree on n elements. %H A195583 Alois P. Heinz, <a href="/A195583/b195583.txt">Table of n, a(n) for n = 0..478</a> %H A195583 Wikipedia, <a href="https://en.wikipedia.org/wiki/Binary_search_tree">Binary search tree</a> %H A195583 <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a> %H A195583 <a href="/index/Tra#trees">Index entries for sequences related to trees</a> %p A195583 seq(denom(a(n)), n=0..25); %Y A195583 See A195582 for more information. %K A195583 nonn,frac %O A195583 0,4 %A A195583 _Alois P. Heinz_, Sep 20 2011