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 A168498 #3 Mar 30 2012 18:52:37 %S A168498 1,2,11,15,16,17,20,22,23,24,25,29,30,32,33,34,35,37,39,40,41,44,45, %T A168498 46,47,48,50,51,52,53,55,56,57,58,59,60,63,64,65,66,67,68,69,70,71,72, %U A168498 74,75,76,78,79,80,81,82,83,84,85,87,88,89,90,92,94,96,97,100,101,102,104 %N A168498 The positions of non-single or nonisolated numbers in A000010. %C A168498 Numbers n such that phi(n)=non-single or nonisolated number. %Y A168498 Cf. A000010, A167707. %K A168498 nonn %O A168498 1,2 %A A168498 _Juri-Stepan Gerasimov_, Nov 27 2009 %E A168498 Extended by _R. J. Mathar_, Nov 30 2009