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 A049028 #15 Apr 11 2020 06:25:39
%S A049028 1,7,55,454,3850,33202,289606,2546773,22532905,200301403,1787165647,
%T A049028 15993710992,143484404584,1289890360528,11615931435592,
%U A049028 104760483639286,946005479787778,8552032916587066,77386316886280822,700854120680500744
%N A049028 Row sums of triangle A035529.
%H A049028 Wolfdieter Lang, <a href="https://cs.uwaterloo.ca/journals/JIS/vol3.html">On generalizations of Stirling number triangles</a>, J. Integer Seqs., Vol. 3 (2000), #00.2.4.
%F A049028 G.f.: (1-(1-9*x)^(1/3))/(4*(1-9*x)^(1/3)-1).
%t A049028 Rest[CoefficientList[Series[(1-(1-9*x)^(1/3))/(4*(1-9*x)^(1/3)-1),{x,0,20}],x]] (* _Georg Fischer_, Apr 11 2020 *)
%K A049028 easy,nonn
%O A049028 1,2
%A A049028 _Wolfdieter Lang_
%E A049028 a(10) corrected by _Georg Fischer_, Apr 11 2020