A378443 Inverse Möbius transform of A372573.

1, 1, 1, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 2, 2, 2, 2, 4, 2, 2, 2, 2, 4, 3, 2, 2, 2, 4, 2, 4, 2, 2, 2, 2, 2, 4, 3, 3, 2, 2, 2, 3, 4, 4, 2, 2, 2, 4, 2, 2, 2, 3, 4, 4, 2, 2, 2, 4, 2, 4, 2, 2, 3, 2, 4, 4, 2, 4, 2, 2, 2, 4, 4, 2, 2, 4, 2, 4, 4, 2, 2, 2, 4, 4, 2, 3, 2, 3, 2, 4, 2, 4, 4

Offset

1,5

Comments

Number of terms of A339746 that divide n.

Links

Antti Karttunen, Table of n, a(n) for n = 1..20000

Formula

a(n) = Sum_{d|n} A372573(d).

Prog

(PARI)
A372573(n) = !((valuation(n, 2)-valuation(n, 3))%3);
A378443(n) = sumdiv(n, d, A372573(d));

Crossrefs

Cf. A339746, A372573.

Cf. also A174273, A378444.

Sequence in context: A225180 A276134 A297031 * A229895 A063982 A374900

Adjacent sequences: A378440 A378441 A378442 * A378444 A378445 A378446

Keyword

nonn

Author

Antti Karttunen, Nov 27 2024

Status

approved