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 A227118 #5 Jul 01 2013 17:05:17 %S A227118 1,5,9,13,16,19,22,25,28,2,3,4,8,14,15,20,21,26,27,6,7,11,10,12,17,18, %T A227118 23,24,29,31,32,30,33,34,35,36,37,38,39,41,42,43,40,44,45,46,47,48,49, %U A227118 51,52,53,54,50,55,56,57,58,59,61,62,63,64,65,60,66,67 %N A227118 Inverse permutation to A184992. %H A227118 Reinhard Zumkeller, <a href="/A227118/b227118.txt">Table of n, a(n) for n = 1..10000</a> %H A227118 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A227118 (Haskell) %o A227118 import Data.List (elemIndex); import Data.Maybe (fromJust) %o A227118 a227118 = (+ 1) . fromJust . (`elemIndex` a184992_list) %K A227118 nonn %O A227118 1,2 %A A227118 _Reinhard Zumkeller_, Jul 01 2013