login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A034762 Dirichlet convolution of primes (with 1) with sigma(n). 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
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
Sequence in context: A243844 A271656 A145582 * A138919 A345909 A214414
KEYWORD
nonn
AUTHOR
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 21 20:41 EST 2024. Contains 370237 sequences. (Running on oeis4.)