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 A288566 #8 Aug 18 2021 21:46:30
%S A288566 0,1,3,4,8,11,19,20,22,27,43,46,78,87,93,94,158,161,289,294,304,321,
%T A288566 577,580,584,617,619,628,1140,1147,2171,2172,2190,2255,2267,2270,4318,
%U A288566 4447,4481,4486,8582,8593,16785,16802,16808,17065,33449,33452,33460,33465,33531,33564,66332,66335,66355,66364
%N A288566 Partial sums of A087207.
%H A288566 N. J. A. Sloane, <a href="/A288566/b288566.txt">Table of n, a(n) for n = 1..10000</a>
%F A288566 G.f.: (1/(1 - x)) * Sum_{k>=1} 2^(k-1) * x^prime(k) / (1 - x^prime(k)). - _Ilya Gutkovskiy_, Aug 18 2021
%Y A288566 Cf. A087207.
%K A288566 nonn
%O A288566 1,3
%A A288566 _N. J. A. Sloane_, Jun 24 2017