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 A287034 #8 May 20 2017 21:54:37 %S A287034 9,880,46150,1877925,68167144,2361060574,80937962070,2804699592420, %T A287034 99488140850125,3639765997208250,137945128982354064, %U A287034 5429115690940281085,222153735090644107080,9454530091092393873300,418429413013429353003828,19248239324252460855866832 %N A287034 Column 4 of A286782. %H A287034 Gheorghe Coserea, <a href="/A287034/b287034.txt">Table of n, a(n) for n = 5..214</a> %F A287034 a(n) = (2*n-1)*A286789(n-1). %Y A287034 Cf. A286782. %K A287034 nonn %O A287034 5,1 %A A287034 _Gheorghe Coserea_, May 18 2017