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 A026954 #9 Oct 18 2019 04:04:03
%S A026954 1,10,83,452,3171,14700,97482,422544,2730615,11442786,72932904,
%T A026954 299882916,1895949055,7706754370,48478715240,195623710160,
%U A026954 1226501910315,4925351886030,30811853728475,123326259948044,770315837004637,3076174085773624,19193549752057758,76523420240817792
%N A026954 a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026386.
%K A026954 nonn
%O A026954 3,2
%A A026954 _Clark Kimberling_
%E A026954 More terms from _Sean A. Irvine_, Oct 18 2019