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A326059 a(n) = A285309(n) - n, where A285309 gives the sum of nonsquare divisors of n. 4
-1, 0, 0, -2, 0, 5, 0, 2, -6, 7, 0, 11, 0, 9, 8, -6, 0, 11, 0, 17, 10, 13, 0, 31, -20, 15, 3, 23, 0, 41, 0, 10, 14, 19, 12, 5, 0, 21, 16, 45, 0, 53, 0, 35, 23, 25, 0, 55, -42, 17, 20, 41, 0, 56, 16, 59, 22, 31, 0, 103, 0, 33, 31, -22, 18, 77, 0, 53, 26, 73, 0, 73, 0, 39, 23, 59, 18, 89, 0, 85, -51, 43, 0, 135, 22, 45, 32, 87, 0, 134, 20 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
FORMULA
a(n) = A285309(n) - n.
a(n) = A326058(n) - A033879(n).
PROG
(PARI)
A285309(n) = sumdiv(n, d, (!issquare(d))*d);
A326059(n) = (A285309(n)-n);
CROSSREFS
Sequence in context: A061376 A058974 A369744 * A019962 A086131 A355875
KEYWORD
sign
AUTHOR
Antti Karttunen, Jun 06 2019
STATUS
approved

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Last modified March 29 03:51 EDT 2024. Contains 371264 sequences. (Running on oeis4.)