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

Author

Erich Friedman

Keywords

• nonn

Crossrefs

Cf. A000203, A008578.

Programs

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