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 A109601 #16 May 02 2013 00:19:43 %S A109601 87,711,43,269,65,555,39,421,17 %N A109601 A puzzle sequence: you are asked to find the next three terms. I know nothing more about it. %C A109601 William Maness, Oct 24 2011, observes that so far the terms are all odd numbers and the numbers of digits is alternately 2 and 3. Sequence is likely from a book of math puzzles for grade school. %K A109601 nonn,unkn,base,dumb %O A109601 0,1 %A A109601 _N. J. A. Sloane_, following an email message from Lisa Chu, Jul 25 2005 %E A109601 Comment from William Maness added by _David Applegate_, Oct 24 2011 and edited by _N. J. A. Sloane_