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 A186037 #7 Feb 28 2017 22:35:19
%S A186037 0,1,2,3,2,2,1,1,2,2,1,1,1,1,2,3,2,2,1,1,1,1,3,2,1,1,3,2,2,2,1,1,2,2,
%T A186037 1,1,1,1,3,2,1,1,2,4,3,3,1,1,1,1,3,2,3,3,1,1,2,2,1,1,1,1,2,3,2,2,1,1,
%U A186037 1,1,3
%N A186037 a(n) = log_2((1+A002426(n))/numerator((1+A002426(n))/2^n)).
%H A186037 G. C. Greubel, <a href="/A186037/b186037.txt">Table of n, a(n) for n = 0..1000</a>
%t A186037 b[n_] := If[n < 0, 0, 3^n Hypergeometric2F1[1/2, -n, 1, 4/3]];
%t A186037 a[n_] := Log[2, (1 + b[n])/Numerator[(1 + b[n])/2^n]]; Table[a[n], {n, 0, 50}] (* _G. C. Greubel_, Feb 27 2017 *)
%K A186037 nonn,easy
%O A186037 0,3
%A A186037 _Paul Barry_, Feb 11 2011