A326187 a(n) = sigma(n) - A003557(n).

0, 2, 3, 5, 5, 11, 7, 11, 10, 17, 11, 26, 13, 23, 23, 23, 17, 36, 19, 40, 31, 35, 23, 56, 26, 41, 31, 54, 29, 71, 31, 47, 47, 53, 47, 85, 37, 59, 55, 86, 41, 95, 43, 82, 75, 71, 47, 116, 50, 88, 71, 96, 53, 111, 71, 116, 79, 89, 59, 166, 61, 95, 101, 95, 83, 143, 67, 124, 95, 143, 71, 183, 73, 113, 119, 138, 95, 167, 79

Offset

1,2

Links

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

Formula

a(n) = A000203(n) - A003557(n).

Prog

(PARI)
A003557(n) = { my(f=factor(n)); for (i=1, #f~, f[i, 2] = f[i, 2]-1); factorback(f); }; \\ From A003557
A326187(n) = (sigma(n)-A003557(n));

Crossrefs

Cf. A000203, A003557, A326188.

Cf. also A326184.

Sequence in context: A265546 A066911 A326229 * A071850 A092749 A152076

Adjacent sequences: A326184 A326185 A326186 * A326188 A326189 A326190

Keyword

nonn

Author

Antti Karttunen, Jul 11 2019

Status

approved