A389900 a(n) = A126760(A126760(n)).

0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 4, 1, 1, 1, 1, 1, 5, 3, 2, 1, 3, 1, 2, 1, 1, 1, 1, 1, 6, 1, 1, 2, 1, 1, 7, 1, 3, 2, 2, 1, 3, 4, 1, 1, 4, 1, 8, 1, 1, 1, 1, 1, 9, 5, 1, 3, 5, 2, 1, 1, 1, 3, 3, 1, 10, 2, 2, 1, 2, 1, 11, 1, 4, 1, 1, 1, 4, 6, 1, 1, 6, 1, 12

Offset

0,14

Comments

See also comments in A126759.

Links

Antti Karttunen, Table of n, a(n) for n = 0..65537

Prog

(PARI)
A126760(n) = {n && n\=3^valuation(n, 3)<<valuation(n, 2); n%3+n\6*2 };
A389900(n) = A126760(A126760(n));

Crossrefs

Cf. A126759, A126760.

Cf. also A110963, A389899, A389901.

Sequence in context: A319094 A069283 A319430 * A285337 A328457 A387718

Adjacent sequences: A389897 A389898 A389899 * A389901 A389902 A389903

Keyword

nonn,easy

Author

Antti Karttunen, Oct 19 2025

Status

approved