Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #8 May 31 2019 02:46:58
%S 0,1,3,2,5,7,6,11,15,4,9,13,10,14,23,19,27,31,12,21,29,22,30,47,39,55,
%T 63,8,17,25,18,26,43,28,45,59,20,35,46,37,51,61,53,62,95,38,54,79,57,
%U 87,111,91,119,127,24,41,58,42,60,93,71,94,123,44,75,103
%N Inverse permutation to A325984.
%C This sequence corresponds to f_{3,2} according to the notations in A325984.
%H Rémy Sigrist, <a href="/A325985/b325985.txt">Table of n, a(n) for n = 0..6561</a>
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%F a(3^k) = 2^k for any k >= 0.
%e A325984(13) = 11 hence a(11) = 13.
%Y Cf. A325984.
%K nonn,base
%O 0,3
%A _Rémy Sigrist_, May 30 2019