OFFSET
1,1
COMMENTS
Inverse Moebius transform of A127413.
FORMULA
a(n) = Sum_{d|n} A127413(d).
MATHEMATICA
Table[Sum[Prime[k/GCD[n, k]], {k, 1, n}], {n, 1, 53}]
PROG
(PARI) a(n) = sum(k=1, n, prime(k/gcd(n, k))); \\ Michel Marcus, Sep 20 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Sep 19 2022
STATUS
approved