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A351517
a(n) = Product_{p|n, p prime} p^(pi(p) mod 2).
1
1, 2, 1, 2, 5, 2, 1, 2, 1, 10, 11, 2, 1, 2, 5, 2, 17, 2, 1, 10, 1, 22, 23, 2, 5, 2, 1, 2, 1, 10, 31, 2, 11, 34, 5, 2, 1, 2, 1, 10, 41, 2, 1, 22, 5, 46, 47, 2, 1, 10, 17, 2, 1, 2, 55, 2, 1, 2, 59, 10, 1, 62, 1, 2, 5, 22, 67, 34, 23, 10, 1, 2, 73, 2, 5, 2, 11, 2, 1, 10, 1, 82, 83, 2, 85
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
Cf. A000720 (pi), A351518.
Sequence in context: A295516 A330209 A068822 * A337224 A090079 A165195
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, Feb 12 2022
STATUS
approved