OFFSET
1,3
COMMENTS
The odd bisection is A285703, the even bisection is the sequence itself.
LINKS
FORMULA
Multiplicative with a(2^e) = 1, and for odd primes p, a(p^e) = (q^(e+1)-1)/(q-1), where q = A151799(p).
a(2n) = a(n).
Sum_{k=1..n} a(k) ~ c * n^2, where c = (1/3) * Product_{p prime} (p^3/((p+1)*(p^2-q(p)))) = 0.2722825585..., where q(p) = prevprime(p) (A151799) if p > 2 and q(2) = 1. - Amiram Eldar, Dec 21 2023
PROG
CROSSREFS
KEYWORD
nonn,mult
AUTHOR
Antti Karttunen, Jun 03 2019
STATUS
approved