OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
EXAMPLE
89 is in the sequence because 27 is a primitive root of 89 and 27 is three cubed.
MATHEMATICA
q[n_] := Intersection[PrimitiveRootList[n], Range[Floor@Surd[n, 3]]^3] != {}; Select[Range[360], q] (* Amiram Eldar, Sep 25 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Hauke Worpel (hw1(AT)email.com), May 30 2003
EXTENSIONS
a(1) inserted by Amiram Eldar, Sep 25 2021
STATUS
approved