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A353375
Number of divisors of n that are not in A345452.
3
0, 1, 1, 1, 1, 3, 1, 2, 1, 3, 1, 4, 1, 3, 2, 2, 1, 4, 1, 4, 2, 3, 1, 6, 1, 3, 2, 4, 1, 6, 1, 3, 2, 3, 2, 5, 1, 3, 2, 6, 1, 6, 1, 4, 3, 3, 1, 7, 1, 4, 2, 4, 1, 6, 2, 6, 2, 3, 1, 8, 1, 3, 3, 3, 2, 6, 1, 4, 2, 6, 1, 8, 1, 3, 3, 4, 2, 6, 1, 7, 2, 3, 1, 8, 2, 3, 2, 6, 1, 9, 2, 4, 2, 3, 2, 9, 1, 4, 3, 5, 1, 6, 1, 6, 4
OFFSET
1,6
LINKS
FORMULA
a(n) = Sum_{d|n} 1-A353374(d).
a(n) = A000005(n) - A353376(n).
PROG
(PARI)
A353374(n) = (!(bigomega(n)%2) && !(valuation(n, 2)%2));
A353375(n) = sumdiv(n, d, !A353374(d));
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Apr 17 2022
STATUS
approved