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 A129342 #4 Mar 30 2012 18:41:21
%S A129342 0,2,6,8,22,32,72,128,278,512,1056,2048,4168,8192,16512,32768,65814,
%T A129342 131072,262656,524288,1049632,2097152,4196352,8388608,16781384,
%U A129342 33554432,67117056,134217728,268451968,536870912,1073774592
%N A129342 a(2n) = a(n) + 2^(2n), a(2n+1) = 2^(2n+1).
%F A129342 a(n) = sum{0<=k<=A007814(n), 2^(n/2^k) }.
%F A129342 G.f.: sum{k>=0, 1/(1-2*x^2^k) }.
%Y A129342 Cf. A045654.
%K A129342 nonn,easy
%O A129342 0,2
%A A129342 _Ralf Stephan_, May 28 2007