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A076292 Perfect powers with squarefree root. 0
1, 4, 8, 9, 16, 25, 27, 32, 36, 49, 64, 81, 100, 121, 125, 128, 169, 196, 216, 225, 243, 256, 289, 343, 361, 441, 484, 512, 529, 625, 676, 729, 841, 900, 961, 1000, 1024, 1089, 1156, 1225, 1296, 1331, 1369, 1444, 1521, 1681, 1764, 1849, 2048, 2116, 2187 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A025478(a(n)) = A007947(a(n)).

LINKS

Table of n, a(n) for n=1..51.

EXAMPLE

A001597(17) = 144 = (3*2^2)^2 is not a term.

PROG

(PARI) is(n)=n==1 || (ispower(n, , &n) && issquarefree(n)) \\ Charles R Greathouse IV, Oct 16 2015

CROSSREFS

Cf. A001597, A025478, A005117, A007947, A072777.

Sequence in context: A157985 A001597 A072777 * A090516 A090515 A075309

Adjacent sequences:  A076289 A076290 A076291 * A076293 A076294 A076295

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 06 2002

STATUS

approved

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Last modified September 22 22:24 EDT 2020. Contains 337291 sequences. (Running on oeis4.)