OFFSET
1,2
LINKS
FORMULA
a(n) <= A000005(n).
EXAMPLE
PROG
(PARI)
A322986(n) = { my(m=Map(), s, k=0); fordiv(n, d, if(!mapisdefined(m, s=A258851(d)), mapput(m, s, s); k++)); (k); };
\\ Or maybe more efficiently as, after David A. Corneth's Oct 02 2018 program in A319686:
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 04 2019
STATUS
approved