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A240096
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Numbers with primitive root 15.
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10
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2, 4, 13, 19, 23, 26, 29, 37, 38, 41, 46, 47, 58, 73, 74, 82, 83, 89, 94, 97, 101, 107, 139, 146, 149, 151, 157, 166, 167, 169, 178, 193, 194, 199, 202, 214, 227, 263, 269, 271, 278, 281, 298, 302, 313, 314, 334, 337, 338, 347, 361, 373, 379, 383, 386, 389
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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pr = 15; Select[Range[2, 500], MultiplicativeOrder[pr, #] == EulerPhi[#] &]
Join[{2, 4, 13}, Select[Range[2, 400], PrimitiveRoot[#, 15]==15&]] (* Harvey P. Dale, Jun 30 2018 *)
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CROSSREFS
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Cf. numbers with positive primitive root r: A167791 (r=2), A167792 (r=3), A167793 (r=5), A167794 (r=6), A167795 (r=7), A167796 (r=8), A167797 (r=10), A240028 (r=11), A240030 (r=12), A240032 (r=13), A240094 (r=14).
Cf. numbers with negative primitive root r: A167798 (r=-2), A167799 (r=-3), A167800 (r=-4), A167801 (r=-5), A167802 (r=-6), A167803 (r=-7), A167804 (r=-8), A167805 (r=-9), A167806 (r=-10), A240029 (r=-11), A240031 (r=-12), A240093 (r=-13), A240095 (r=-14), A240097 (r=-15).
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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