%I #13 Apr 17 2024 10:31:35
%S 0,1,3,2,5,4,6,7,10,11,9,8,15,14,12,13,17,16,18,19,20,21,23,22,27,26,
%T 24,25,30,31,29,28,39,38,36,37,34,35,33,32,45,44,46,47,40,41,43,42,54,
%U 55,53,52,51,50,48,49,60,61,63,62,57,56,58,59,65,64,66,67
%N Inverse permutation to A371976.
%H Rémy Sigrist, <a href="/A371977/b371977.txt">Table of n, a(n) for n = 0..8191</a>
%H Rémy Sigrist, <a href="/A371977/a371977.gp.txt">PARI program</a>
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%e A371976(42) = 47, so a(47) = 42.
%o (PARI) \\ See Links section.
%Y Cf. A371976.
%K nonn,base
%O 0,3
%A _Rémy Sigrist_, Apr 15 2024