A034773 Dirichlet convolution of d(n) (number of divisors of n) with primes (with 1).

1, 4, 5, 12, 9, 25, 15, 37, 28, 45, 31, 86, 39, 75, 67, 109, 55, 143, 63, 158, 107, 139, 81, 264, 106, 179, 152, 248, 109, 319, 115, 308, 199, 251, 183, 484, 153, 287, 247, 472, 175, 505, 183, 448, 356, 363, 201, 747, 252, 491, 345, 562, 241, 704, 327, 712, 395

Offset

1,2

Links

Table of n, a(n) for n=1..57.

Prog

(PARI) pbc(n) = if (n==1, 1, prime(n-1));
a(n) = sumdiv(n, d, numdiv(d)*pbc(n/d)); \\ Michel Marcus, Feb 28 2019

Crossrefs

Cf. A000005, A008578.

Sequence in context: A191161 A246316 A344372 * A323766 A330223 A325688

Adjacent sequences: A034770 A034771 A034772 * A034774 A034775 A034776

Keyword

nonn

Author

Erich Friedman

Status

approved