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A280489
a(n) = gcd(n,A241909(n)).
4
1, 2, 1, 1, 1, 3, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1, 1, 3, 1, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 15, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1, 1, 3, 1, 1, 5, 1, 1, 1, 1, 5, 3, 1, 1, 3, 1, 7, 3, 1, 1, 5, 1, 1, 1, 1, 1, 3, 1, 1, 3, 5, 1, 1, 1, 1, 15, 1, 1, 3, 1, 1, 1, 1, 1, 7, 1, 1, 3, 1, 1, 3, 1, 1, 3, 1, 1, 1, 1, 1, 1, 25, 1, 3, 1, 1, 15, 1, 1, 1, 1, 5, 3, 1, 1, 3, 1, 1, 1, 1, 1
OFFSET
1,2
LINKS
FORMULA
a(n) = gcd(n,A241909(n)).
a(n) = n / A280488(n).
Other identities. For all n >= 1:
a(A241909(n)) = a(n).
PROG
(Scheme) (define (A280489 n) (gcd n (A241909 n)))
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 09 2017
STATUS
approved