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A326040
a(n) = sigma(n) - A008833(sigma(n)).
6
0, 2, 0, 6, 5, 8, 4, 14, 12, 9, 8, 24, 13, 20, 20, 30, 9, 38, 16, 41, 16, 0, 20, 56, 30, 41, 36, 52, 29, 36, 16, 54, 32, 45, 32, 90, 37, 56, 52, 81, 41, 80, 40, 80, 77, 36, 32, 120, 56, 92, 36, 49, 45, 116, 36, 116, 64, 81, 56, 164, 61, 80, 100, 126, 80, 0, 64, 117, 80, 0, 36, 194, 73, 113, 120, 136, 80, 164, 64, 185, 0, 117, 80
OFFSET
1,2
FORMULA
a(n) = A000203(n) - A326039(n) = A000203(n) - A008833(A000203(n)).
a(n) = A326055(A000203(n)).
PROG
(PARI)
A008833(n) = (n/core(n));
A326039(n) = A008833(sigma(n));
A326040(n) = (sigma(n)-A008833(sigma(n)));
(PARI)
A326055(n) = (n-A008833(n));
A326040(n) = A326055(sigma(n));
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jun 05 2019
STATUS
approved