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 A027279 #8 Oct 26 2019 22:42:10
%S A027279 7,44,273,1696,10573,66151,415277,2615004,16512355,104526093,
%T A027279 663143211,4215574482,26846320149,171243444982,1093897673897,
%U A027279 6997031842554,44809862773473,287283383574927,1843675415666053,11842954734864350,76138777668602115,489884818519692190
%N A027279 a(n) = Sum_{k=0..2n-2} T(n,k) * T(n,k+2), with T given by A026568.
%K A027279 nonn
%O A027279 2,1
%A A027279 _Clark Kimberling_
%E A027279 More terms from _Sean A. Irvine_, Oct 26 2019