A133702 Inverse Moebius transform of A023136.

1, 2, 4, 3, 4, 8, 4, 4, 9, 8, 4, 12, 4, 8, 16, 5, 6, 18, 4, 12, 16, 8, 4, 16, 9, 8, 16, 12, 4, 32, 8, 6, 16, 12, 16, 27, 4, 8, 16, 16, 6, 32, 8, 12, 36, 8, 4, 20, 9, 18, 24, 12, 4, 32, 16, 16, 16, 8, 4, 48, 4, 16, 44, 7, 20, 32, 4, 18, 16, 32, 4, 36, 10, 8, 36, 12, 16, 32, 4, 20, 25, 12, 4, 48

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..10000

Prog

(PARI) \\ here b(n) is A023136.
b(n)=sumdiv(n>>valuation(n, 2), d, eulerphi(d)/znorder(Mod(4, d)))
a(n)=sumdiv(n, d, b(d)) \\ Andrew Howroyd, Sep 22 2025

Crossrefs

Cf. A023136.

Sequence in context: A050514 A229047 A335841 * A328486 A349606 A332224

Adjacent sequences: A133699 A133700 A133701 * A133703 A133704 A133705

Keyword

nonn

Author

Gary W. Adamson, Sep 21 2007

Extensions

More terms from R. J. Mathar, Jan 19 2009

Status

approved