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 A248043 #6 Feb 23 2015 10:52:15 %S A248043 1,3,6,13,11,16,9,27,32,2,4,5,7,8,10,12,14,15,17,19,20,22,23,26,28,30, %T A248043 31,36,37,21,33,39,45,46,50,53,54,56,61,40,41,52,58,65,66,69,74,80,81, %U A248043 29,49,51,63,67,72,73,78,88,94,68,90,99,102,113,122,130 %N A248043 Inverse permutation to A248024. %H A248043 Reinhard Zumkeller, <a href="/A248043/b248043.txt">Table of n, a(n) for n = 1..10000</a> %H A248043 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A248043 (Haskell) %o A248043 import Data.List (elemIndex); import Data.Maybe (fromJust) %o A248043 a248043 = (+ 1) . fromJust . (`elemIndex` a248024_list) %K A248043 nonn %O A248043 1,2 %A A248043 _Reinhard Zumkeller_, Sep 30 2014