A034762 Dirichlet convolution of primes (with 1) with sigma(n).

1, 5, 7, 18, 13, 40, 21, 61, 44, 74, 41, 157, 51, 120, 113, 194, 71, 261, 81, 293, 179, 220, 103, 542, 162, 278, 256, 461, 137, 654, 145, 587, 331, 386, 321, 1033, 189, 440, 409, 1000, 215, 1032, 225, 829, 720, 554, 247, 1711, 384, 913, 567, 1035, 293, 1468

Offset

1,2

Links

Table of n, a(n) for n=1..54.

Prog

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

Crossrefs

Cf. A000203, A008578.

Sequence in context: A243844 A271656 A145582 * A138919 A345909 A214414

Adjacent sequences: A034759 A034760 A034761 * A034763 A034764 A034765

Keyword

nonn

Author

Erich Friedman

Status

approved