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A340678 a(n) = A008472(n) / gcd(A007947(n), A008472(n)). 3
0, 1, 1, 1, 1, 5, 1, 1, 1, 7, 1, 5, 1, 9, 8, 1, 1, 5, 1, 7, 10, 13, 1, 5, 1, 15, 1, 9, 1, 1, 1, 1, 14, 19, 12, 5, 1, 21, 16, 7, 1, 2, 1, 13, 8, 25, 1, 5, 1, 7, 20, 15, 1, 5, 16, 9, 22, 31, 1, 1, 1, 33, 10, 1, 18, 8, 1, 19, 26, 1, 1, 5, 1, 39, 8, 21, 18, 3, 1, 7, 1, 43, 1, 2, 22, 45, 32, 13, 1, 1, 20, 25, 34, 49, 24, 5, 1, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..16384
Antti Karttunen, Data supplement: n, a(n) computed for n = 1..65537
FORMULA
a(n) = A008472(n) / A099636(n) = A008472(n) / gcd(A007947(n), A008472(n)).
PROG
(PARI)
A007947(n) = factorback(factorint(n)[, 1]);
A008472(n) = vecsum(factor(n)[, 1]);
A340678(n) = { my(v=A008472(n)); (v/gcd(A007947(n), v)); };
CROSSREFS
Cf. A007947, A008472, A099636, A340677.
Cf. also A082343.
Sequence in context: A309206 A358016 A250097 * A028235 A028236 A066504
Adjacent sequences: A340675 A340676 A340677 * A340679 A340680 A340681
KEYWORD
nonn
AUTHOR
Antti Karttunen, Feb 01 2021
STATUS
approved

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Last modified August 30 04:06 EDT 2024. Contains 375524 sequences. (Running on oeis4.)