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A030013 Moebius transform of {1, primes}. 3
1, 1, 2, 3, 6, 7, 12, 12, 16, 15, 28, 17, 36, 27, 34, 30, 52, 32, 60, 41, 56, 43, 78, 40, 82, 59, 82, 59, 106, 43, 112, 80, 100, 83, 120, 70, 150, 95, 124, 88, 172, 73, 180, 115, 134, 117, 198, 98, 210, 122, 174, 133, 238, 100, 216, 142, 200, 161, 270, 107, 280, 169, 206, 180 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..64.

N. J. A. Sloane, Transforms

PROG

(PARI) a(n) = sumdiv(n, d, if (d==1, 1, prime(d-1))*moebius(n/d)); \\ Michel Marcus, Nov 04 2018

CROSSREFS

Cf. A008578 ({1, primes}), A007444 (Moebius transform of primes), A008683.

Sequence in context: A115889 A101319 A182538 * A130404 A064689 A240175

Adjacent sequences:  A030010 A030011 A030012 * A030014 A030015 A030016

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

Offset 1 and more terms from Michel Marcus, Nov 04 2018

STATUS

approved

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Last modified November 13 17:34 EST 2019. Contains 329106 sequences. (Running on oeis4.)