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 A287043 #7 May 20 2017 21:55:31 %S A287043 9,550,19760,586425,16271380,446964322,12516198870,362901875292, %T A287043 10984979930625,348559615602900,11613184968311010,406385382363237945, %U A287043 14927815613184463440,575018321453046128700,23197450399028711170020,978734324107274793589440,43125048817869336467480865 %N A287043 Column 3 of A286783. %H A287043 Gheorghe Coserea, <a href="/A287043/b287043.txt">Table of n, a(n) for n = 4..213</a> %Y A287043 Cf. A286783. %K A287043 nonn %O A287043 4,1 %A A287043 _Gheorghe Coserea_, May 19 2017