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 A186108 #5 Mar 30 2012 17:22:57 %S A186108 2,4,16,16,128,256,256,2048,8192,32768,16384,262144,262144,2097152, %T A186108 8388608,16777216,33554432,134217728,536870912,1073741824,4294967296, %U A186108 2147483648,34359738368,137438953472,274877906944,274877906944,2199023255552,4398046511104,1099511627776,35184372088832 %N A186108 Denominator of the frequency of the n-th dropping time in the Collatz iteration. %C A186108 The numerators are in A186107. %H A186108 <a href="/index/3#3x1">Index entries for sequences related to 3x+1 (or Collatz) problem</a> %F A186108 a(n) = denominator of A186009(n) / 2^A020914(n-1). %Y A186108 Cf. A126241 (dropping times) %K A186108 nonn,frac %O A186108 1,1 %A A186108 _T. D. Noe_, Feb 12 2011