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 A214417 #9 Mar 22 2022 00:10:43 %S A214417 0,1,3,2,6,5,4,7,11,10,9,12,15,14,13,8,20,19,18,21,24,23,22,17,28,27, %T A214417 26,29,16,31,30,25,37,36,35,38,41,40,39,34,45,44,43,46,33,48,47,42,53, %U A214417 52,51,54,57,56,55,50,61,60,59,62,49,32,63,58,70,69,68 %N A214417 Inverse permutation to A105027. %H A214417 Reinhard Zumkeller, <a href="/A214417/b214417.txt">Table of n, a(n) for n = 0..10000</a> %H A214417 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A214417 (Haskell) %o A214417 -- import Data.List (elemIndex) %o A214417 -- import Data.Maybe (fromJust) %o A214417 a214417 = fromJust . (`elemIndex` a105027_list) %Y A214417 Cf. A214416, A214414 (fixed points). %K A214417 nonn %O A214417 0,3 %A A214417 _Reinhard Zumkeller_, Jul 21 2012