A326040 a(n) = sigma(n) - A008833(sigma(n)).

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

Links

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

Index entries for sequences related to sigma(n)

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

Cf. A000203, A008833, A326039, A326055.

Sequence in context: A140247 A271170 A111520 * A145419 A276763 A338465

Adjacent sequences: A326037 A326038 A326039 * A326041 A326042 A326043

Keyword

nonn

Author

Antti Karttunen, Jun 05 2019

Status

approved