A329375 a(n) = Sum_{d|n, d<n} d*omega(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

1,4

Links

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

Formula

a(n) = Sum_{d|n, d<n} d*A001221(d).

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

Prog

(PARI) A329375(n) = sumdiv(n, d, (d<n)*omega(d)*d);

Crossrefs

Cf. A001221, A328260, A329354.

Sequence in context: A242690 A054013 A048050 * A078153 A104035 A340592

Adjacent sequences: A329372 A329373 A329374 * A329376 A329377 A329378

Keyword

nonn

Author

Antti Karttunen, Nov 15 2019

Status

approved