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A316665
a(n) is the least k > 0 such that k*n does not belong to A002202.
2
3, 7, 1, 17, 1, 15, 1, 19, 1, 5, 1, 43, 1, 1, 1, 19, 1, 5, 1, 17, 1, 7, 1, 167, 1, 1, 1, 11, 1, 3, 1, 19, 1, 1, 1, 67, 1, 1, 1, 17, 1, 17, 1, 7, 1, 5, 1, 211, 1, 1, 1, 7, 1, 11, 1, 13, 1, 3, 1, 139, 1, 1, 1, 31, 1, 9, 1, 1, 1, 5, 1, 109, 1, 1, 1, 1, 1, 3, 1
OFFSET
1,1
COMMENTS
All terms are odd.
FORMULA
a(n) = 1 iff n belongs to A007617.
PROG
(PARI) a(n) = forstep (k=1, oo, 2, if (!istotient(n*k), return (k)))
CROSSREFS
Sequence in context: A210037 A210197 A324715 * A110238 A077505 A309376
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Jul 10 2018
STATUS
approved