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 A244021 #6 Jun 20 2014 13:35:13 %S A244021 5,10,15,90,3495 %N A244021 Analog of A244020, but starting with 5 points instead of 4. %H A244021 Shalosh B. Ekhad, Doron Zeilberger, <a href="http://arxiv.org/abs/1406.5157">Enumerative Geometrical Genealogy (Or: The Sex Life of Points and Lines)</a>, arXiv:1406.5157 [math.CO], (19-June-2014) %Y A244021 Related sequences: A140468, A244020-A244026. %K A244021 nonn,more %O A244021 1,1 %A A244021 _N. J. A. Sloane_, Jun 20 2014