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 A168496 #4 Mar 30 2012 18:52:37 %S A168496 1,2,4,6,8,9,10,11,12,14,15,16,17,18,20,21,22,23,25,26,27,28,29,30,32, %T A168496 33,34,35,36,37,39,40,41,42,44,45,46,47,49,50,51,52,53,55,56,57,58,59, %U A168496 60,62,63,64,65,66,67,69,70,71,72,74,75,76,77,78,79,81,82,83,85,86,87 %N A168496 The positions of non-single or nonisolated numbers in A001477. %F A168496 a(n) = 1+A167707(n). %Y A168496 Cf. A001477, A167707. %K A168496 nonn,less %O A168496 1,2 %A A168496 _Juri-Stepan Gerasimov_, Nov 27 2009 %E A168496 Formula corrected by _R. J. Mathar_, Jun 04 2010