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A353372 Inverse Möbius transform of A353370. 3
1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 3, 1, 1, 2, 1, 2, 3, 1, 2, 1, 1, 1, 3, 1, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 2, 1, 2, 1, 3, 1, 1, 1, 1, 2, 3, 1, 1, 2, 3, 1, 3, 1, 2, 2, 2, 2, 3, 1, 1, 1, 1, 1, 4, 1, 2, 1, 1, 1, 4, 1, 1, 2, 1, 2, 2, 1, 2, 2, 1, 1, 3, 1, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
COMMENTS
Number of terms of A325698 that divide n.
LINKS
FORMULA
a(n) = Sum_{d|n} A353370(d).
a(n) = A000005(n) - A353371(n).
a(p) = 1 for all primes p.
a(n) = a(A003961(n)) = a(A348717(n)), for all n >= 1.
PROG
(PARI)
A353370(n) = { my(f = factor(n)); (0==sum(i=1, #f~, f[i, 2]*((-1)^(primepi(f[i, 1])%2)))); };
A353372(n) = sumdiv(n, d, A353370(d));
CROSSREFS
Sequence in context: A317240 A348444 A326620 * A305501 A184170 A025919
KEYWORD
nonn
AUTHOR
Antti Karttunen, Apr 16 2022
STATUS
approved

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)