A177196 Number of distinct representations of A163143(n) as a "zipper number".

1, 1, 1, 1, 1, 1, 2, 4, 1, 1, 1, 5, 1, 1, 1, 2, 1, 1, 6, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 3, 4, 1, 1, 1, 2, 1, 5, 1, 1, 1, 1, 2, 3, 3, 2, 2, 2, 1, 1, 1, 1, 8, 2, 2, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 2, 3, 1, 1, 1, 1, 2, 12, 1, 1, 1, 2, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 4, 2, 1, 1, 1, 1, 1, 1, 1, 3, 2, 10, 4, 1, 2, 1, 1

Offset

1,7

Comments

See A163143 for definition of "zipper number".

Links

Ray Chandler, Table of n, a(n) for n=1..253

Ray Chandler, Distinct representations of "zipper numbers" less than 1000.

Example

a(7)=2 since A163143(7) = 44 = 2^1*22^1 = 4^1*11^1.
a(8)=4 since A163143(8) = 48 = 2^3*6^1 = 3^1*16^1 = 2^1*2^3*3^1 = 2^2*2^2*3^1.

Crossrefs

Cf. A163143.

Sequence in context: A099803 A348424 A247645 * A010741 A094643 A094593

Adjacent sequences: A177193 A177194 A177195 * A177197 A177198 A177199

Keyword

nonn,base

Author

Ray Chandler, May 04 2010

Status

approved