A361647 - OEIS

%I #9 Mar 21 2023 15:03:51

%S 0,1,2,3,4,6,7,5,8,10,12,13,14,15,11,9,16,18,20,21,24,28,29,25,26,30,

%T 31,27,22,23,19,17,32,34,36,37,40,44,45,41,48,52,56,57,58,59,53,49,50,

%U 54,60,61,62,63,55,51,42,46,47,43,38,39,35,33,64,66,68,69

%N Inverse permutation to A361646.

%H Rémy Sigrist, <a href="/A361647/b361647.txt">Table of n, a(n) for n = 0..8192</a>

%H Rémy Sigrist, <a href="/A361647/a361647.gp.txt">PARI program</a>

%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

%F a(n) < 2^k iff n < 2^k.

%e A361646(42) = 56, so a(56) = 42.

%o (PARI) See Links section.

%Y Cf. A361646.

%K nonn,base

%O 0,3

%A _Rémy Sigrist_, Mar 19 2023