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 A186107 #6 Mar 30 2012 17:22:57 %S A186107 1,1,1,1,3,7,3,15,85,173,119,961,663,8045,17637,51033,54475,312455, %T A186107 663535,950235,5936673,1684037,39993895,87986917,128989251,205059181, %U A186107 949737339,2861515293,400296173,19018424205 %N A186107 Numerator of the frequency of the n-th dropping time in the Collatz iteration. %C A186107 The possible dropping times are in A020914. The denominators are in A186108. The cumulative frequency of the dropping time is A186109(n)/A186110(n). %H A186107 <a href="/index/3#3x1">Index entries for sequences related to 3x+1 (or Collatz) problem</a> %F A186107 a(n) = numerator of A186009(n) / 2^A020914(n-1). %e A186107 The frequencies are 1/2, 1/4, 1/16, 1/16, 3/128, 7/256, 3/256, 15/2048, 85/8192,.... %Y A186107 Cf. A126241 (dropping times) %K A186107 nonn,frac %O A186107 1,5 %A A186107 _T. D. Noe_, Feb 12 2011