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 A258330 #4 May 27 2015 05:55:33 %S A258330 7,4,1,8,5,2,9,6,3,70,77,84,91,98,105,12,19,26,33,40,47,54,61,68,75, %T A258330 82,89,96,203,10,17,24,31,38,45,52,59,66,73,80,87,94,301,308,15,22,29, %U A258330 36,43,50,57,64,71,78,85,92,99,406,13,20,27,34,41,48,55,62 %N A258330 Inverse permutation to A258329. %H A258330 Reinhard Zumkeller, <a href="/A258330/b258330.txt">Table of n, a(n) for n = 1..9999</a> %H A258330 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A258330 (Haskell) %o A258330 import Data.List (elemIndex); import Data.Maybe (fromJust) %o A258330 a258330 = (+ 1) . fromJust . (`elemIndex` a258329_list) %Y A258330 Cf. A258329. %K A258330 nonn %O A258330 1,1 %A A258330 _Reinhard Zumkeller_, May 27 2015