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 A084469 #8 Jul 29 2017 12:49:00 %S A084469 1,2,3,4,6,7,5,8,9,12,10,11,15,16,13,18,14,17,20,23,21,22,19,24,26,31, %T A084469 27,30,28,29,25,32,33,40,34,39,35,38,36,37,45,46,41,50,42,49,43,48,44, %U A084469 47,54,57,55,56,51,60,52,59,53,58,64,69,65,68,66,67,61,72,62,71,63,70 %N A084469 Position of A084467(n) in A084468(n). %H A084469 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %H A084469 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A084469 Inverse permutation: A084470. %K A084469 nonn %O A084469 1,2 %A A084469 _Antti Karttunen_, Jun 02 2003