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 A343857 #11 May 09 2021 05:00:31
%S A343857 0,1,2,3,4,5,7,8,9,11,13,15,16,17,19,21,23,27,29,31,32,33,35,37,39,43,
%T A343857 45,47,55,57,59,63,64,65,67,69,71,75,77,79,87,89,91,95,103,111,115,
%U A343857 117,119,127,128,129,131,133,135,139,141,143,151,153,155,159,167
%N A343857 Partial sums of A343856.
%C A343857 The scatterplot of the sequence is similar at different scales.
%H A343857 Rémy Sigrist, <a href="/A343857/b343857.txt">Table of n, a(n) for n = 0..10776</a>
%H A343857 Rémy Sigrist, <a href="/A343857/a343857.gp.txt">PARI program for A343857</a>
%F A343857 Sum_{k = 1..Sum_{m = 1..n} A061419(m)} a(k) = 2^n-1.
%e A343857 a(3) = A343856(1) + A343856(2) + A343856(3) = 1 + 1 + 1 = 3.
%o A343857 (PARI) See Links section.
%o A343857 (Python) # auptorow in A343856
%o A343857 from itertools import accumulate
%o A343857 print([0]+list(accumulate(auptorow(8)))) # _Michael S. Branicky_, May 04 2021
%Y A343857 Cf. A061419, A343856.
%K A343857 nonn
%O A343857 0,3
%A A343857 _Rémy Sigrist_, May 01 2021