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 A226387 #12 Mar 20 2022 21:42:53 %S A226387 1,2,3,4,7,11,8,16,5,12,9,22,10,13,14,29,37,23,38,24,15,46,39,56,6,47, %T A226387 17,25,40,67,41,79,48,49,50,92,42,51,52,57,43,68,44,26,27,53,45,106, %U A226387 121,28,54,137,154,58,55,59,172,173,155,191,156,174,138,211 %N A226387 Inverse permutation to A085612. %H A226387 Rémy Sigrist, <a href="/A226387/b226387.txt">Table of n, a(n) for n = 1..10000</a> %H A226387 Rémy Sigrist, <a href="/A226387/a226387.gp.txt">PARI program for A226387</a> %H A226387 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A226387 (Haskell) %o A226387 import Data.List (elemIndex); import Data.Maybe (fromJust) %o A226387 a226387 = (+ 1) . fromJust . (`elemIndex` a085612_list) %o A226387 (PARI) See Links section. %Y A226387 Cf. A224401. %K A226387 nonn %O A226387 1,2 %A A226387 _Reinhard Zumkeller_, Jun 05 2013 %E A226387 More terms from _Rémy Sigrist_, Apr 25 2021