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 A156168 #2 Mar 30 2012 16:51:15 %S A156168 1,305,6815585,1077270776465,626055764653322945, %T A156168 968553361387420436695025,3286322019402928956112227932705, %U A156168 21485762937086358457367440231243675985,246710262382186399710713892753099905250964865,4640407584638100957359112105517273132340130164039345 %N A156168 A bisection of A002437. %K A156168 nonn %O A156168 0,2 %A A156168 _N. J. A. Sloane_, Nov 06 2009