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 A287033 #10 Mar 26 2023 10:08:52 %S A287033 7,414,14850,446706,12641265,354665628,10134495804,299276271252, %T A287033 9206327818259,296247209694650,9990889751320686,353320474467334502, %U A287033 13098406010068671725,508634687713890475320,20666091174548150099160,877474636354254652191336,38883242288915246015258751 %N A287033 Column 3 of A286782. %H A287033 Gheorghe Coserea, <a href="/A287033/b287033.txt">Table of n, a(n) for n = 4..213</a> %F A287033 a(n) = (2*n-1)*A286788(n-1). %Y A287033 Cf. A286782, A286788. %K A287033 nonn %O A287033 4,1 %A A287033 _Gheorghe Coserea_, May 18 2017