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 A237860 #18 Mar 15 2014 05:01:57 %S A237860 1,2,9,3,19,6,33,4,10,8,53,7,54,14,18,5,96,11,385,13,34,35,441,12,20, %T A237860 36,45,15,562,17,592,16,55,40,50,22,1259,59,56,21,2419,23,2744,24,51, %U A237860 61,2917,25,97,49,100,48,3993,28,77,26,123,71,4389,27,5424,105 %N A237860 Inverse permutation to A237851. %H A237860 Lars Blomberg, <a href="/A237860/b237860.txt">Table of n, a(n) for n = 1..10000</a> (first 106 terms from Reinhard Zumkeller; first 1380 terms from Reinhard Zumkeller and Giovanni Resta) %H A237860 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A237860 (Haskell) %o A237860 import Data.List (elemIndex); import Data.Maybe (fromJust) %o A237860 a237860 = (+ 1) . fromJust . (`elemIndex` a237851_list) %Y A237860 Cf. A237851. %K A237860 nonn,base %O A237860 1,2 %A A237860 _Reinhard Zumkeller_, Feb 14 2014