A353829 Inverse permutation to A353828.

0, 1, 2, 3, 4, 7, 6, 5, 8, 9, 10, 11, 12, 13, 22, 21, 20, 19, 18, 17, 14, 15, 16, 25, 24, 23, 26, 27, 28, 29, 30, 31, 34, 33, 32, 35, 36, 37, 38, 39, 40, 67, 66, 65, 64, 63, 62, 59, 60, 61, 58, 57, 56, 55, 54, 53, 50, 51, 52, 43, 42, 41, 44, 45, 46, 47, 48, 49

Offset: 0

Author

Rémy Sigrist, May 08 2022

Keywords

• nonn
• base

Examples

			A353828(7) = 5, so a(5) = 7.
		

Links

• Rémy Sigrist, Table of n, a(n) for n = 0..6561
• Index entries for sequences that are permutations of the natural numbers

Crossrefs

Cf. A353828.

Programs

PARI

a(n) = {
    my (d=[], t, p=1);
    while (n, d=concat(t=[0, 1, -1][1+n%3], d); n=(n-t)/3);
    for (k=1, #d, if (d[k], p*=d[k]=p*d[k]));
    fromdigits(d, 3);
}