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 A268606 #23 Apr 18 2016 17:35:21 %S A268606 1,5,116,15785,11599297,47212453928,1100377983366327, %T A268606 148568527921382084692 %N A268606 Number of ways to trisect a hexagon with side length n exactly into three identical parts in a triangular lattice. %H A268606 G. P. Jelliss, <a href="http://www.mayhematics.com/j/gpj22.htm#(3)">Dissected Hexagons</a>, The Games and Puzzles Journal, Issue 22, January-April 2002. %H A268606 Luca Petrone, <a href="/A268606/a268606.pdf">Illustration showing a(3) = 116</a> %Y A268606 Cf. A257952, A271741, A271857. %K A268606 nonn,hard,more %O A268606 1,2 %A A268606 _Luca Petrone_, Feb 08 2016 %E A268606 Added a(6) from Jelliss's website by _Vaclav Kotesovec_, Mar 03 2016 %E A268606 a(7)-a(8) from _Andrew Howroyd_, Apr 11 2016