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A327169 Number of distinct k such that A000005(k)*A000010(k) is equal to n. 5
1, 1, 0, 1, 0, 1, 0, 2, 0, 0, 0, 1, 0, 0, 0, 2, 0, 1, 0, 1, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

COMMENTS

a(n) tells how many times in total n occurs in A062355.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..20000

FORMULA

a(n) = Sum_{k=1..n} [A000005(k)*A000010(k) == n], where [ ] is the Iverson bracket.

PROG

(PARI) A327169(n) = sum(k=1, n, (eulerphi(k)*numdiv(k))==n);

CROSSREFS

Cf. A000005, A000010, A062355.

Cf. also A327153, A327166.

Sequence in context: A055029 A126812 A008442 * A299173 A285720 A269175

Adjacent sequences:  A327166 A327167 A327168 * A327170 A327171 A327172

KEYWORD

nonn

AUTHOR

Antti Karttunen, Sep 19 2019

STATUS

approved

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Last modified July 2 16:47 EDT 2020. Contains 335404 sequences. (Running on oeis4.)