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 A186110 #5 Mar 30 2012 17:22:57
%S A186110 2,4,16,8,128,256,16,2048,8192,32768,32768,262144,16384,2097152,
%T A186110 8388608,16777216,33554432,134217728,536870912,1073741824,4294967296,
%U A186110 4294967296,34359738368,137438953472,274877906944,137438953472,2199023255552,4398046511104,4398046511104,35184372088832
%N A186110 Denominator of the cumulative frequency of the dropping time in the Collatz iteration.
%C A186110 The numerators are in A186109. The frequency of the n-th dropping time is A186107(n)/A186108(n).
%H A186110 <a href="/index/3#3x1">Index entries for sequences related to 3x+1 (or Collatz) problem</a>
%F A186110 a(n) = denominator of sum_{k=1..n} A186009(k) / 2^A020914(k-1).
%Y A186110 Cf. A126241 (dropping times)
%K A186110 nonn,frac
%O A186110 1,1
%A A186110 _T. D. Noe_, Feb 12 2011