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 A084496 #9 Jul 29 2017 12:40:47 %S A084496 1,3,9,5,13,7,11,2,17,6,19,4,15,12,25,8,21,10,23,16,31,18,29,14,27,24, %T A084496 35,22,37,20,39,32,33,26,43,28,47,30,41,38,45,34,51,40,55,36,53,48,49, %U A084496 42,61,46,57,44,63,52,59,56,69,50,67,54,71,64,65,60,77,58,79,62,73,70 %N A084496 Inverse permutation to A084495. %H A084496 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %H A084496 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %K A084496 nonn %O A084496 1,2 %A A084496 _Antti Karttunen_, Jun 02 2003