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 A049836 #12 Aug 08 2021 03:43:49
%S A049836 1,4,11,22,41,62,97,134,183,236,311,376,475,568,673,788,939,1066,1245,
%T A049836 1398,1579,1772,2011,2202,2459,2708,2979,3240,3579,3842,4217,4546,
%U A049836 4907,5280,5681,6032,6519,6960,7421,7848,8411
%N A049836 a(n) = Sum_{m=1..n, k=1..m} T(m,k), array T as in A049834.
%Y A049836 Partial sums of A049835.
%Y A049836 Cf. A049834.
%K A049836 nonn
%O A049836 1,2
%A A049836 _Clark Kimberling_