A329375 a(n) = Sum_{d|n, d

0, 0, 0, 2, 0, 5, 0, 6, 3, 7, 0, 21, 0, 9, 8, 14, 0, 26, 0, 31, 10, 13, 0, 53, 5, 15, 12, 41, 0, 72, 0, 30, 14, 19, 12, 90, 0, 21, 16, 79, 0, 94, 0, 61, 47, 25, 0, 117, 7, 52, 20, 71, 0, 89, 16, 105, 22, 31, 0, 230, 0, 33, 61, 62, 18, 138, 0, 91, 26, 132, 0, 218, 0, 39, 63, 101, 18, 160, 0, 175, 39, 43, 0, 304, 22, 45, 32, 157, 0, 297, 20

Offset: 1

Author

Antti Karttunen, Nov 15 2019

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..65537

Crossrefs

Cf. A001221, A328260, A329354.

Programs

PARI

A329375(n) = sumdiv(n,d,(d
				

Formula

a(n) = Sum_{d|n, dA001221(d).

a(n) = A329354(n) - A328260(n).