OFFSET
1,2
EXAMPLE
a(6) = 302; a(6) = Sum_{d|6} Sum_{p|6, p prime} d^p = Sum_{d|6} (d^2 + d^3) = (1^2 + 1^3) + (2^2 + 2^3) + (3^2 + 3^3) + (6^2 + 6^3) = 302.
CROSSREFS
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, Feb 18 2022
STATUS
approved