A215509 Numerator of sigma(n)/n when n belongs to A162657.

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

Offset: 1

Author

Michel Marcus, Aug 14 2012

Keywords

• nonn

Comments

When p is prime, A162657(p)=p so a(p)=p+1.

Examples

			A162657(2) = 2, so a(2)=numerator(sigma(2)/2)=numerator(3/2)=3.
		

Links

• Michel Marcus, Table of n, a(n) for n = 1..1000

Crossrefs

Equal to or greater than A214409.