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A064610 Places n where A064608(n) (partial sums of unitary tau) is divisible by n. 6
1, 35, 37, 1015, 27417, 27421, 27449, 27453, 19774739, 530743781, 530743799, 530743807, 530743813 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The corresponding quotients are 1, 3, 3, 5, 7, 7, 7, 7, 11, 13, 13, 13, 13, ...

LINKS

Table of n, a(n) for n=1..13.

FORMULA

{n: A064608(n) == 0 (mod n)}.

EXAMPLE

For n = 37, the sum A064608(37) = 1+2+2+2+2+4+2+...+4+4+4+2 = 111 = 3*37, so 37 is in the sequence.

CROSSREFS

Analogous "integer-mean" sequences for various arithmetical functions are A050226, A056650, A064605, A064606, A064607, A048290, A063986, A063971, A064911, A062982, A045345.

Sequence in context: A160775 A160021 A172016 * A030589 A114965 A279410

Adjacent sequences:  A064607 A064608 A064609 * A064611 A064612 A064613

KEYWORD

nonn,more

AUTHOR

Labos Elemer, Sep 24 2001

EXTENSIONS

a(10)-a(13) from Donovan Johnson, Jul 20 2012

STATUS

approved

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Last modified April 20 09:59 EDT 2019. Contains 322309 sequences. (Running on oeis4.)