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 A174999 #9 Aug 29 2020 07:59:36
%S A174999 4,16,24,48,63,75,115,139,199,215,250,334,382,402,438,550,580,643,787,
%T A174999 811,891,1071,1092,1140,1239,1267,1339,1559,1679,1943,1975,2020,2090,
%U A174999 2233,2293,2605,2773,2809,2929,3293,3338,3434,3629,4049,4089,4161,4385
%N A174999 Partial sums of A156681.
%F A174999 a(n) = Sum_{i=1..n} A156681(i).
%Y A174999 Cf. A156681.
%K A174999 nonn
%O A174999 1,1
%A A174999 _Jonathan Vos Post_, Apr 03 2010
%E A174999 a(45) corrected by _Georg Fischer_, Aug 29 2020