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 A117922 #13 Dec 14 2015 15:00:53 %S A117922 1,2,3,4,7,6,5,8,9,10,17,16,11,14,13,12,15,18,19,22,21,20,23,24,29,32, %T A117922 31,28,25,26,27,36,33,30,35,40,41,34,37,38,43,42,39,48,47,54,51,44,45, %U A117922 50,55,46,49,52,53,56,57,64,69,72,59,62,67,66,61,60,71,68,63,58,73,70 %N A117922 Inverse of A055265, assuming it is a permutation, as conjectured. %H A117922 T. D. Noe, <a href="/A117922/b117922.txt">Table of n, a(n) for n = 1..1000</a> %H A117922 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A117922 (Haskell) %o A117922 import Data.List (elemIndex) %o A117922 import Data.Maybe (fromJust) %o A117922 a117922 = (+ 1) . fromJust . (`elemIndex` a055265_list) %o A117922 -- _Reinhard Zumkeller_, Feb 14 2013 %Y A117922 A117924(n) = a(a(n)); A117925 lists fixed points. %K A117922 nonn %O A117922 1,2 %A A117922 _Reinhard Zumkeller_, Apr 03 2006 %E A117922 Edited by _M. F. Hasler_, Dec 14 2015