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A093061 6 * Sum_{d|n} (d mod 3). 2
6, 18, 6, 24, 18, 18, 12, 36, 6, 36, 18, 24, 12, 36, 18, 42, 18, 18, 12, 54, 12, 36, 18, 36, 24, 36, 6, 48, 18, 36, 12, 54, 18, 36, 36, 24, 12, 36, 12, 72, 18, 36, 12, 54, 18, 36, 18, 42, 18, 54, 18, 48, 18, 18, 36, 72, 12, 36, 18, 54, 12, 36, 12, 60, 36, 36, 12, 54, 18, 72, 18, 36, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The old entry with this sequence number was a duplicate of A090331.

LINKS

Table of n, a(n) for n=1..73.

FORMULA

a(n) = 6*A082909(n). - Michel Marcus, May 26 2014

MATHEMATICA

Table[6 Sum[Mod[d, 3], {d, Divisors[n]}], {n, 50}] (* Wesley Ivan Hurt, May 28 2014 *)

PROG

(PARI) a(n) = 6*sumdiv(n, d, d % 3); \\ Michel Marcus, May 26 2014

CROSSREFS

Cf. A004016, A082909.

Sequence in context: A209341 A077022 A074923 * A264028 A078741 A248461

Adjacent sequences:  A093058 A093059 A093060 * A093062 A093063 A093064

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Nov 02 2008

STATUS

approved

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Last modified September 28 19:16 EDT 2021. Contains 347717 sequences. (Running on oeis4.)