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 A137163 #3 Mar 30 2012 18:53:41 %S A137163 1,1,2,1,2,1,3,1,3,1,1,1,4,1,4,1,1,1,5,1,2,1,1,1,5,1,6,1,1,1,6,1,2,1, %T A137163 1,1,2,1,7,1,1,1,7,1,2,1,1,1,8,1,3,1,1 %N A137163 Like sequence A137161 but starting from the sequence of natural number A000027. %e A137163 Step=0 -> 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,.. %e A137163 Now any "1" position insert the numbers of Step=0. %e A137163 Step=1 -> 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,.. %e A137163 Now any "3" positions insert the numbers of Step=1 %e A137163 Step=2 -> 1,1,2,1,2,3,3,1,4,4,5,2,5,6,6,2,7,7,8,3,8,9,9,3,10,.. %e A137163 Now any "5" positions insert the numbers of Step=2 %e A137163 Step=3 -> 1,1,2,1,2,1,3,3,1,4,4,1,5,2,5,6,6,2,2,7,7,8,3,1,8,9,.. %e A137163 And so on. %Y A137163 Cf. A137161, A137162. %K A137163 easy,nonn %O A137163 0,3 %A A137163 _Paolo P. Lava_, Jan 28 2008