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Inverse permutation to A353824.
2

%I #8 May 10 2022 02:26:38

%S 0,1,2,3,4,5,6,8,7,9,10,11,12,13,14,15,17,16,18,20,19,24,25,26,21,23,

%T 22,27,28,29,30,31,32,33,35,34,36,37,38,39,40,41,42,44,43,45,47,46,51,

%U 52,53,48,50,49,54,56,55,60,61,62,57,59,58,72,73,74,75,76

%N Inverse permutation to A353824.

%H Rémy Sigrist, <a href="/A353825/b353825.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>

%e A353824(8) = 7, so a(7) = 8.

%o (PARI) a(n) = { my (d=digits(n,3), p=Mod(1,3)); for (k=1, #d, if (d[k], p*=d[k]=lift(d[k]/p))); fromdigits(d, 3) }

%Y Cf. A353824.

%K nonn,base

%O 0,3

%A _Rémy Sigrist_, May 08 2022