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 A084494 #9 Jul 29 2017 12:44:03 %S A084494 1,3,2,6,4,5,8,9,7,12,11,10,16,13,14,15,19,17,20,18,24,21,23,22,26,28, %T A084494 25,27,32,30,29,31,35,36,33,34,40,39,37,38,42,43,44,41,46,48,47,45,51, %U A084494 50,52,49,56,54,55,53,59,60,58,57,64,63,62,61,68,65,66,69,67,72,70,74 %N A084494 Inverse permutation to A084493. %H A084494 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %H A084494 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A084494 Used to compute A084495. %K A084494 nonn %O A084494 1,2 %A A084494 _Antti Karttunen_, Jun 02 2003