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A080848 (mu(n)+2)*n, where mu is the Moebius function (A008683). 3
3, 2, 3, 8, 5, 18, 7, 16, 18, 30, 11, 24, 13, 42, 45, 32, 17, 36, 19, 40, 63, 66, 23, 48, 50, 78, 54, 56, 29, 30, 31, 64, 99, 102, 105, 72, 37, 114, 117, 80, 41, 42, 43, 88, 90, 138, 47, 96, 98, 100, 153, 104, 53, 108, 165, 112, 171, 174, 59, 120, 61, 186, 126, 128, 195, 66 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

n <= a(n) <= 3*n.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

PROG

(Scheme) (define (A080848 n) (* n (+ 2 (A008683 n)))) ;; Antti Karttunen, Jul 26 2017

CROSSREFS

Cf. A008683, A080847, A080849.

Sequence in context: A187153 A213265 A123649 * A016602 A131134 A151690

Adjacent sequences:  A080845 A080846 A080847 * A080849 A080850 A080851

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 20 2003

STATUS

approved

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Last modified April 14 17:01 EDT 2021. Contains 342950 sequences. (Running on oeis4.)