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A175781 a(n) = n^(1/k) with the smallest k>1 such that n is a k-th power, taking k=1 if no such k>1 exists. 1
0, 1, 2, 3, 2, 5, 6, 7, 2, 3, 10, 11, 12, 13, 14, 15, 4, 17, 18, 19, 20, 21, 22, 23, 24, 5, 26, 3, 28, 29, 30, 31, 32, 33, 34, 35, 6, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 7, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 8, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..76.

CROSSREFS

Cf. A052410, A007947.

Sequence in context: A019555 A243074 A052410 * A072775 A243057 A090078

Adjacent sequences:  A175778 A175779 A175780 * A175782 A175783 A175784

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Sep 03 2010

EXTENSIONS

Edited by the Associate Editors of the OEIS, Sep 03 2010

STATUS

approved

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Last modified May 29 03:28 EDT 2017. Contains 287242 sequences.