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 A271741 #26 Apr 17 2016 09:31:17 %S A271741 1,8,731,982648,16305532683,3722056510716702,11931439930135002524767 %N A271741 Number of ways to dissect a hexagon with side length n exactly into two identical parts in a triangular lattice. %H A271741 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. %Y A271741 Cf. A268606, A271857, A113900. %K A271741 nonn,more %O A271741 1,2 %A A271741 _Andrew Howroyd_, Apr 15 2016