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 A085985 #3 Mar 30 2012 18:50:37 %S A085985 0,1,2,1,3,4,5,1,2,6,7,8,9,10,11,1,12,13,14,15,16,17,18,19,3,20,2,21, %T A085985 22,23,24,1,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,4,41,42, %U A085985 43,44,45,46,47,48,49,50,51,52,53,54,1,55,56,57,58,59,60,61,62,63,64 %N A085985 a(n) = A049084(A085818(n)). %C A085985 a(A085971(n))=A000027(n) and for all k>1: a(A000040(n)^k)=A000027(n). %K A085985 nonn %O A085985 1,3 %A A085985 _Reinhard Zumkeller_, Jul 06 2003