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 A262461 #4 Sep 24 2015 09:37:13 %S A262461 1,5,10,16,20,24,28,32,36,40,44,48,52,56,60,2,3,4,9,15,21,23,29,31,37, %T A262461 39,45,47,53,55,61,6,8,7,11,17,19,25,27,33,35,41,43,49,51,57,59,12,14, %U A262461 18,13,65,70,72,80,82,63,84,86,88,90,92,94,66,22,26,64 %N A262461 Inverse permutation to A262460. %H A262461 Reinhard Zumkeller, <a href="/A262461/b262461.txt">Table of n, a(n) for n = 1..10000</a> %H A262461 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A262461 (Haskell) %o A262461 import Data.List (elemIndex); import Data.Maybe (fromJust) %o A262461 a262461 = (+ 1) . fromJust . (`elemIndex` a262460_list) %Y A262461 Cf. A262411. %K A262461 nonn %O A262461 1,2 %A A262461 _Reinhard Zumkeller_, Sep 23 2015