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 A107897 #2 Mar 30 2012 17:26:16 %S A107897 1,2,4,3,5,6,8,7,9,10,11,12,15,13,17,14,16,18,19,20,21,23,22,24,25,28, %T A107897 26,32,27,33,29,30,34,36,35,31,38,37,39,46,40,41,44,42,45,47,51,49,43, %U A107897 53,50,58,52,56,55,62,48,61,67,54,60,57,70,64,59,65,66,69,63,71,74,83 %N A107897 Position of n in A107896. %C A107897 A107897(n)=pi(A073653(n)). Is A107896 a permutation of natural numbers? %F A107897 a(n)=pi(A073653(n)) %Y A107897 Cf. A073653, A107896. %K A107897 nonn %O A107897 1,2 %A A107897 _Zak Seidov_, May 26 2005