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 A215196 #14 Sep 13 2014 07:50:44 %S A215196 1,3,40,576,606,8988,10296 %N A215196 Numbers n such that A143615(n) = n. %C A215196 a(8) (if it exists) > 10^8. - _Hiroaki Yamanouchi_, Sep 11 2014 %K A215196 nonn,more %O A215196 1,2 %A A215196 _Naohiro Nomoto_, Aug 05 2012 %E A215196 a(6)-a(7) from _Max Alekseyev_, Aug 18 2013