A134665 Exponent of highest power of 2 dividing the n-th multiply perfect number A007691.

0, 1, 2, 3, 4, 5, 6, 5, 3, 9, 2, 9, 12, 7, 9, 8, 8, 13, 16, 7, 7, 10, 14, 13, 18, 14, 13, 11, 5, 10, 10, 8, 11, 11, 7, 7, 14, 15, 5, 9, 30, 11, 8, 17, 15, 11, 11, 14, 20, 20, 20, 15, 21, 19, 25, 19, 15, 17, 17, 17, 22, 25, 20, 25, 19, 19, 19, 27, 19, 19, 27, 17, 19, 27, 19, 21, 23, 20

Offset: 1

Author

T. D. Noe, Nov 05 2007

Keywords

• nonn

Comments

The large terms, for example at n=41, correspond to the perfect numbers A000396 in A007691. See A134666 for the number of multiply perfect numbers having a given highest exponent of 2.

Links

• T. D. Noe, Table of n, a(n) for n=1..5000 (using Flammenkamp's data)
• Achim Flammenkamp, The Multiply Perfect Numbers Page

Crossrefs

Cf. A007814, A007691.

Formula

a(n) = A007814(A007691(n)). - Michel Marcus, Oct 10 2017