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 A114218 #7 Mar 14 2015 13:52:58 %S A114218 1,2,4,6,6,7,9,19,31 %N A114218 Values of k when A114216(n)=1. %C A114218 The last term 19 corresponds to n=33900 in A114216: A114216(33899) = 123729 and 33900th prime is 400559, hence 123729 + 400559 = 524288 = 2^19 and A114216(33900) = 1. Cf. A114217 values of n such that A114216(n) = 1. %Y A114218 Cf. A114216, A114217. %K A114218 nonn %O A114218 1,2 %A A114218 _Zak Seidov_, Nov 18 2005 %E A114218 a(9) from _Donovan Johnson_, May 13 2010