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 A068523 #2 Sep 29 2006 03:00:00 %S A068523 2,3,5,7,11,17,23,37,59,89,139,227,359,577,929,1499,2423,3919,6337, %T A068523 10253 %N A068523 Essentially the same as A055500. %K A068523 dead %O A068523 1,1