A347104 - OEIS

A347104

Dirichlet g.f.: primezeta(s-1) * zeta(s-1) / zeta(s).

0, 2, 3, 2, 5, 7, 7, 4, 6, 13, 11, 10, 13, 19, 22, 8, 17, 18, 19, 18, 32, 31, 23, 20, 20, 37, 18, 26, 29, 38, 31, 16, 52, 49, 58, 24, 37, 55, 62, 36, 41, 56, 43, 42, 54, 67, 47, 40, 42, 60, 82, 50, 53, 54, 94, 52, 92, 85, 59, 60, 61, 91, 78, 32, 112, 92, 67, 66, 112, 106, 71, 48, 73, 109, 100

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OFFSET

1,2

COMMENTS

a(n) is the sum of the prime terms in row n of A050873.

Moebius transform of A328260.

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = Sum_{d|n} mu(n/d) * d * omega(d).

a(n) = Sum_{p|n, p prime} p * phi(n/p).

a(n) = Sum_{k=1..n} A010051(gcd(n,k)) * gcd(n,k).