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 A027299 #9 Oct 27 2019 11:14:30
%S A027299 1,3,8,20,32,79,128,312,512,1234,2048,4888,8192,19387,32768,76976,
%T A027299 131072,305902,524288,1216536,2097152,4840950,8388608,19273360,
%U A027299 33554432,76766564,134217728,305877616,536870912,1219164499,2147483648
%N A027299 a(n) = Sum_{k=0..m} (k+1) * A026022(n, m-k), where m=n for n=0,1 and m = floor((n+3)/2) for n >= 2.
%K A027299 nonn
%O A027299 0,2
%A A027299 _Clark Kimberling_