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 A026985 #8 Oct 20 2019 22:02:37
%S A026985 1,3,10,25,69,161,412,927,2275,5005,11958,25909,60753,130185,301064,
%T A026985 639761,1463787,3090217,7010750,14722575,33171193,69357949,155376996,
%U A026985 323702075,721673251,1498859829,3327877658,6893460863
%N A026985 a(n) = Sum_{k=0..n} (k+1) * A026670(n, k).
%K A026985 nonn
%O A026985 0,2
%A A026985 _Clark Kimberling_