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 A119577 #9 May 26 2020 11:00:30
%S A119577 0,3,42,390,2940,19530,119196,684684,3758040,19909890,102539580,
%T A119577 516023508,2547314952,12371513700,59252218200,280374917400,
%U A119577 1312759571760,6089545431090,28014942671100,127932182324100
%N A119577 (n+n^2+n^3)*(binomial(2*n,n))/2.
%p A119577 [seq ((n+n^2+n^3)*(binomial(2*n,n))/2,n=0..29)];
%t A119577 Table[(n+n^2+n^3) Binomial[2n,n]/2,{n,0,20}] (* _Harvey P. Dale_, May 26 2020 *)
%Y A119577 Cf. A000984, A027444.
%K A119577 easy,nonn
%O A119577 0,2
%A A119577 _Zerinvary Lajos_, May 31 2006