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 A104695 #2 Mar 30 2012 17:26:11 %S A104695 3,1,2,4,6,7,9,12,15,10,18,5,21,13,24,16,27,8,11,19,14,22,30,25,33,36, %T A104695 39,42,28,31,45,34,48,51,37,40,54,43,57,46,49,52,60,55 %N A104695 Rearrangement of positive integers inverse to A104694. %F A104695 a(n) shows the position of n in A104694. %Y A104695 Cf. A104639, A104640, A104641, A104692, A104693, A104694. %K A104695 easy,nonn,base %O A104695 1,1 %A A104695 _Zak Seidov_, Mar 18 2005