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 A189419 #18 Mar 20 2022 21:42:46 %S A189419 1,2,9,3,7,10,34,4,15,8,26,11,31,35,110,5,57,16,68,52,41,27,63,12,47, %T A189419 32,100,36,106,111,209,6,23,58,88,17,124,69,82,53,145,42,118,28,397, %U A189419 64,95,13,76,48,152,33,224 %N A189419 Inverse permutation to A114183. %H A189419 N. J. A. Sloane, <a href="/A189419/b189419.txt">Table of n, a(n) for n = 1..3660</a> %H A189419 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A189419 (Haskell) %o A189419 import Data.List (elemIndex) %o A189419 import Data.Maybe (fromJust) %o A189419 a189419 = (+ 1) . fromJust . (`elemIndex` a114183_list) %o A189419 -- _Reinhard Zumkeller_, Mar 05 2013 %K A189419 nonn %O A189419 1,2 %A A189419 _Franklin T. Adams-Watters_, Apr 22 2011