OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
q[n_] := Intersection[PrimitiveRootList[n], Range[Floor@Surd[n, 7]]^7] != {}; Select[Range[1000], q] (* Amiram Eldar, Oct 07 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Hauke Worpel (hw1(AT)email.com), May 30 2003
EXTENSIONS
a(1) inserted and more terms added by Amiram Eldar, Oct 07 2021
STATUS
approved