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A177196
Number of distinct representations of A163143(n) as a "zipper number".
2
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".
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
KEYWORD
nonn,base
AUTHOR
Ray Chandler, May 04 2010
STATUS
approved