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 A114217 #4 Mar 30 2012 17:34:56 %S A114217 1,2,5,12,14,20,75,33900,78493252 %N A114217 Numbers n such that A114216(n)=1. %C A114217 Is 33900 the last term? No other terms <10000000. Cf. A114218 values of k when A114216(n)=1. %C A114217 a(10) > 4*10^9. [From _Donovan Johnson_, May 13 2010] %Y A114217 Cf. A114216, A114218. %K A114217 nonn %O A114217 1,2 %A A114217 _Zak Seidov_, Nov 18 2005 %E A114217 a(9) from _Donovan Johnson_, May 13 2010