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 #11 May 22 2019 22:13:04
%S 1,2,3,4,7,5,8,6,13,9,15,11,16,14,25,10,31,19,32,12,24,17,63,21,57,30,
%T 29,18,64,23,127,22,49,33,56,27,128,62,48,20,255,40,256,28,39,65,511,
%U 26,120,55,61,34,512,35,113,46,96,126,1023,41,1024,129,51,42
%N Inverse permutation to A109852.
%H Charlie Neder, <a href="/A308301/b308301.txt">Table of n, a(n) for n = 1..1000</a>
%H Rémy Sigrist, <a href="/A308301/a308301.gp.txt">PARI program for A308301</a>
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%e A109852(1023) = 59, hence a(59) = 1023.
%o (PARI) See Links section.
%Y Cf. A109852.
%K nonn
%O 1,2
%A _Rémy Sigrist_, May 19 2019