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A215509 Numerator of sigma(n)/n when n belongs to A162657. 1
1, 3, 4, 7, 6, 13, 8, 15, 13, 21, 12, 31, 14, 31, 26, 31, 18, 49, 20, 63, 32, 45, 24, 65, 31, 49, 40, 57, 30, 91, 32, 63, 52, 63, 48, 91, 38, 75, 56, 93, 42, 127, 44, 93, 121, 93, 48, 127, 57, 93, 80, 105, 54, 121, 72, 127, 80, 105, 60, 217, 62, 127, 104 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
When p is prime, A162657(p)=p so a(p)=p+1.
LINKS
EXAMPLE
A162657(2) = 2, so a(2)=numerator(sigma(2)/2)=numerator(3/2)=3.
CROSSREFS
Equal to or greater than A214409.
Sequence in context: A324054 A214413 A214409 * A053480 A258052 A344484
KEYWORD
nonn
AUTHOR
Michel Marcus, Aug 14 2012
STATUS
approved

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Last modified February 21 03:52 EST 2024. Contains 370219 sequences. (Running on oeis4.)