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 A084466 #9 Jul 29 2017 12:41:30 %S A084466 1,3,11,5,13,7,15,8,9,2,21,4,23,6,25,16,17,18,19,10,33,12,29,14,35,26, %T A084466 27,22,39,30,31,20,45,24,47,36,37,28,51,40,41,42,43,32,59,34,53,48,49, %U A084466 38,63,46,65,54,55,56,57,44,73,60,61,50,75,52,77,66,67,68,69,70,71,58 %N A084466 Inverse permutation to A084455. %H A084466 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %H A084466 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %K A084466 nonn %O A084466 1,2 %A A084466 _Antti Karttunen_, Jun 02 2003