OFFSET
1,2
COMMENTS
Product of the odd-indexed prime divisors of n (or 1 if no such divisors exist).
EXAMPLE
a(30) = 10; The odd-indexed prime divisors of 30 are 2,5 and their product is 10.
CROSSREFS
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, Feb 12 2022
STATUS
approved