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A084365 Squarefree kernel of numbers that are not prime powers. 1
6, 10, 6, 14, 15, 6, 10, 21, 22, 6, 26, 14, 30, 33, 34, 35, 6, 38, 39, 10, 42, 22, 15, 46, 6, 10, 51, 26, 6, 55, 14, 57, 58, 30, 62, 21, 65, 66, 34, 69, 70, 6, 74, 15, 38, 77, 78, 10, 82, 42, 85, 86, 87, 22, 30, 91, 46, 93, 94, 95, 6, 14, 33, 10, 102, 26, 105, 106, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A007947(A024619(n)).

MATHEMATICA

f[n_] := If[Length[(p = FactorInteger[n][[;; , 1]])] > 1, Times @@ p, 0]; Select[f /@ Range[300], # > 0 &] (* Amiram Eldar, Sep 07 2020 *)

CROSSREFS

Cf. A007947, A024619.

Sequence in context: A156383 A247270 A010726 * A066135 A070393 A071630

Adjacent sequences:  A084362 A084363 A084364 * A084366 A084367 A084368

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 22 2003

STATUS

approved

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Last modified August 2 20:05 EDT 2021. Contains 346428 sequences. (Running on oeis4.)