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 A244023 #4 Jun 20 2014 13:36:53 %S A244023 6,15,45,855,342000 %N A244023 Analog of A244020, but starting with 6 points instead of 4. %H A244023 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 A244023 Related sequences: A140468, A244020-A244026. %K A244023 nonn,more %O A244023 1,1 %A A244023 _N. J. A. Sloane_, Jun 20 2014