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 A027153 #8 Oct 24 2019 16:03:03
%S A027153 1,4,11,32,77,212,503,1376,3257,8900,21059,57536,136133,371924,879983,
%T A027153 2404160,5688305,15540740,36769787,100456928,237683645,649363796,
%U A027153 1536411239,4197553568,9931518377,27133412804,64198343987
%N A027153 a(n) = Sum_{0<=j<=i<=n} A027144(i, j).
%Y A027153 Partial sums of A027151.
%K A027153 nonn
%O A027153 0,2
%A A027153 _Clark Kimberling_