%I #6 Jun 11 2015 17:39:30
%S 1,4,6,5,10,7,2,8,12,9,20,11,13,3,16,14,35,15,36,17,18,19,21,23,30,24,
%T 38,25,26,29,39,33,37,34,31,22,43,41,44,32,42,40,50,47,45,28,27,46,49,
%U 48,51,53,74,52,59,54,63,55,56,58,84,57,62,65,60,64,69
%N Smallest m such that A258767(m) = n.
%C If A258767 is a permutation, this sequence is its inverse.
%H Reinhard Zumkeller, <a href="/A258827/b258827.txt">Table of n, a(n) for n = 1..10000</a>
%o (Haskell)
%o import Data.List (elemIndex); import Data.Maybe (fromJust)
%o a258827 = (+ 1) . fromJust . (`elemIndex` a258767_list)
%Y Cf. A258767, A258768 (fixed points).
%K nonn
%O 1,2
%A _Reinhard Zumkeller_, Jun 11 2015