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 A237058 #5 Feb 09 2014 16:11:56 %S A237058 1,3,5,2,7,4,9,6,8,10,11,12,13,14,16,18,15,20,22,24,26,28,17,30,19,32, %T A237058 34,36,21,38,40,42,44,46,48,50,23,52,54,56,25,58,27,60,62,64,29,66,68, %U A237058 70,72,74,31,76,78,80,82,84,86,88,33,90,92,94,96,98,35 %N A237058 Inverse permutation to A237056. %H A237058 Reinhard Zumkeller, <a href="/A237058/b237058.txt">Table of n, a(n) for n = 1..10000</a> %H A237058 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A237058 (Haskell) %o A237058 import Data.List (elemIndex); import Data.Maybe (fromJust) %o A237058 a237058 = (+ 1) . fromJust . (`elemIndex` a237056_list) %K A237058 nonn %O A237058 1,2 %A A237058 _Antti Karttunen_ and _Reinhard Zumkeller_, Feb 04 2014